The Integers 1901 to 2000

• Count(d(N)) is the number of positive divisors of n, including 1 and n itself.
• σ(N) is the Divisor Function. It represents the sum of all the positive divisors of n, including 1 and n itself.
• s(N) is the Restricted Divisor Function. It represents the sum of the proper divisors of n, excluding n itself.
• For a Prime Number, Count(d(N))=2. The only divisors for a Prime Number are 1 and itself.
• A Deficient Number is greater than the sum of its proper divisors; that is, s(N)<n.
• An Abundant Number is less than the sum of its proper divisors; that is, s(N)>n.
• A Perfect Number equals the sum of its proper divisors; that is, s(N)=n.

N	Divisors of N	Count(d(N))	σ(N)	s(N)	Prime or Composite	Notes
1901	1, 1901	2	1902	1	Prime	Deficient
1902	1, 2, 3, 6, 317, 634, 951, 1902	8	3816	1914	Composite	Abundant
1903	1, 11, 173, 1903	4	2088	185	Composite	Deficient
1904	1, 2, 4, 7, 8, 14, 16, 17, 28, 34, 56, 68, 112, 119, 136, 238, 272, 476, 952, 1904	20	4464	2560	Composite	Abundant
1905	1, 3, 5, 15, 127, 381, 635, 1905	8	3072	1167	Composite	Deficient
1906	1, 2, 953, 1906	4	2862	956	Composite	Deficient
1907	1, 1907	2	1908	1	Prime	Deficient
1908	1, 2, 3, 4, 6, 9, 12, 18, 36, 53, 106, 159, 212, 318, 477, 636, 954, 1908	18	4914	3006	Composite	Abundant
1909	1, 23, 83, 1909	4	2016	107	Composite	Deficient
1910	1, 2, 5, 10, 191, 382, 955, 1910	8	3456	1546	Composite	Deficient
1911	1, 3, 7, 13, 21, 39, 49, 91, 147, 273, 637, 1911	12	3192	1281	Composite	Deficient
1912	1, 2, 4, 8, 239, 478, 956, 1912	8	3600	1688	Composite	Deficient
1913	1, 1913	2	1914	1	Prime	Deficient
1914	1, 2, 3, 6, 11, 22, 29, 33, 58, 66, 87, 174, 319, 638, 957, 1914	16	4320	2406	Composite	Abundant
1915	1, 5, 383, 1915	4	2304	389	Composite	Deficient
1916	1, 2, 4, 479, 958, 1916	6	3360	1444	Composite	Deficient
1917	1, 3, 9, 27, 71, 213, 639, 1917	8	2880	963	Composite	Deficient
1918	1, 2, 7, 14, 137, 274, 959, 1918	8	3312	1394	Composite	Deficient
1919	1, 19, 101, 1919	4	2040	121	Composite	Deficient
1920	1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 32, 40, 48, 60, 64, 80, 96, 120, 128, 160, 192, 240, 320, 384, 480, 640, 960, 1920	32	6120	4200	Composite	Abundant
1921	1, 17, 113, 1921	4	2052	131	Composite	Deficient
1922	1, 2, 31, 62, 961, 1922	6	2979	1057	Composite	Deficient
1923	1, 3, 641, 1923	4	2568	645	Composite	Deficient
1924	1, 2, 4, 13, 26, 37, 52, 74, 148, 481, 962, 1924	12	3724	1800	Composite	Deficient
1925	1, 5, 7, 11, 25, 35, 55, 77, 175, 275, 385, 1925	12	2976	1051	Composite	Deficient
1926	1, 2, 3, 6, 9, 18, 107, 214, 321, 642, 963, 1926	12	4212	2286	Composite	Abundant
1927	1, 41, 47, 1927	4	2016	89	Composite	Deficient
1928	1, 2, 4, 8, 241, 482, 964, 1928	8	3630	1702	Composite	Deficient
1929	1, 3, 643, 1929	4	2576	647	Composite	Deficient
1930	1, 2, 5, 10, 193, 386, 965, 1930	8	3492	1562	Composite	Deficient
1931	1, 1931	2	1932	1	Prime	Deficient
1932	1, 2, 3, 4, 6, 7, 12, 14, 21, 23, 28, 42, 46, 69, 84, 92, 138, 161, 276, 322, 483, 644, 966, 1932	24	5376	3444	Composite	Abundant
1933	1, 1933	2	1934	1	Prime	Deficient
1934	1, 2, 967, 1934	4	2904	970	Composite	Deficient
1935	1, 3, 5, 9, 15, 43, 45, 129, 215, 387, 645, 1935	12	3432	1497	Composite	Deficient
1936	1, 2, 4, 8, 11, 16, 22, 44, 88, 121, 176, 242, 484, 968, 1936	15	4123	2187	Composite	Abundant
1937	1, 13, 149, 1937	4	2100	163	Composite	Deficient
1938	1, 2, 3, 6, 17, 19, 34, 38, 51, 57, 102, 114, 323, 646, 969, 1938	16	4320	2382	Composite	Abundant
1939	1, 7, 277, 1939	4	2224	285	Composite	Deficient
1940	1, 2, 4, 5, 10, 20, 97, 194, 388, 485, 970, 1940	12	4116	2176	Composite	Abundant
1941	1, 3, 647, 1941	4	2592	651	Composite	Deficient
1942	1, 2, 971, 1942	4	2916	974	Composite	Deficient
1943	1, 29, 67, 1943	4	2040	97	Composite	Deficient
1944	1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 27, 36, 54, 72, 81, 108, 162, 216, 243, 324, 486, 648, 972, 1944	24	5460	3516	Composite	Abundant
1945	1, 5, 389, 1945	4	2340	395	Composite	Deficient
1946	1, 2, 7, 14, 139, 278, 973, 1946	8	3360	1414	Composite	Deficient
1947	1, 3, 11, 33, 59, 177, 649, 1947	8	2880	933	Composite	Deficient
1948	1, 2, 4, 487, 974, 1948	6	3416	1468	Composite	Deficient
1949	1, 1949	2	1950	1	Prime	Deficient
1950	1, 2, 3, 5, 6, 10, 13, 15, 25, 26, 30, 39, 50, 65, 75, 78, 130, 150, 195, 325, 390, 650, 975, 1950	24	5208	3258	Composite	Abundant
1951	1, 1951	2	1952	1	Prime	Deficient
1952	1, 2, 4, 8, 16, 32, 61, 122, 244, 488, 976, 1952	12	3906	1954	Composite	Abundant
1953	1, 3, 7, 9, 21, 31, 63, 93, 217, 279, 651, 1953	12	3328	1375	Composite	Deficient
1954	1, 2, 977, 1954	4	2934	980	Composite	Deficient
1955	1, 5, 17, 23, 85, 115, 391, 1955	8	2592	637	Composite	Deficient
1956	1, 2, 3, 4, 6, 12, 163, 326, 489, 652, 978, 1956	12	4592	2636	Composite	Abundant
1957	1, 19, 103, 1957	4	2080	123	Composite	Deficient
1958	1, 2, 11, 22, 89, 178, 979, 1958	8	3240	1282	Composite	Deficient
1959	1, 3, 653, 1959	4	2616	657	Composite	Deficient
1960	1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 98, 140, 196, 245, 280, 392, 490, 980, 1960	24	5130	3170	Composite	Abundant
1961	1, 37, 53, 1961	4	2052	91	Composite	Deficient
1962	1, 2, 3, 6, 9, 18, 109, 218, 327, 654, 981, 1962	12	4290	2328	Composite	Abundant
1963	1, 13, 151, 1963	4	2128	165	Composite	Deficient
1964	1, 2, 4, 491, 982, 1964	6	3444	1480	Composite	Deficient
1965	1, 3, 5, 15, 131, 393, 655, 1965	8	3168	1203	Composite	Deficient
1966	1, 2, 983, 1966	4	2952	986	Composite	Deficient
1967	1, 7, 281, 1967	4	2256	289	Composite	Deficient
1968	1, 2, 3, 4, 6, 8, 12, 16, 24, 41, 48, 82, 123, 164, 246, 328, 492, 656, 984, 1968	20	5208	3240	Composite	Abundant
1969	1, 11, 179, 1969	4	2160	191	Composite	Deficient
1970	1, 2, 5, 10, 197, 394, 985, 1970	8	3564	1594	Composite	Deficient
1971	1, 3, 9, 27, 73, 219, 657, 1971	8	2960	989	Composite	Deficient
1972	1, 2, 4, 17, 29, 34, 58, 68, 116, 493, 986, 1972	12	3780	1808	Composite	Deficient
1973	1, 1973	2	1974	1	Prime	Deficient
1974	1, 2, 3, 6, 7, 14, 21, 42, 47, 94, 141, 282, 329, 658, 987, 1974	16	4608	2634	Composite	Abundant
1975	1, 5, 25, 79, 395, 1975	6	2480	505	Composite	Deficient
1976	1, 2, 4, 8, 13, 19, 26, 38, 52, 76, 104, 152, 247, 494, 988, 1976	16	4200	2224	Composite	Abundant
1977	1, 3, 659, 1977	4	2640	663	Composite	Deficient
1978	1, 2, 23, 43, 46, 86, 989, 1978	8	3168	1190	Composite	Deficient
1979	1, 1979	2	1980	1	Prime	Deficient
1980	1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 15, 18, 20, 22, 30, 33, 36, 44, 45, 55, 60, 66, 90, 99, 110, 132, 165, 180, 198, 220, 330, 396, 495, 660, 990, 1980	36	6552	4572	Composite	Abundant
1981	1, 7, 283, 1981	4	2272	291	Composite	Deficient
1982	1, 2, 991, 1982	4	2976	994	Composite	Deficient
1983	1, 3, 661, 1983	4	2648	665	Composite	Deficient
1984	1, 2, 4, 8, 16, 31, 32, 62, 64, 124, 248, 496, 992, 1984	14	4064	2080	Composite	Abundant
1985	1, 5, 397, 1985	4	2388	403	Composite	Deficient
1986	1, 2, 3, 6, 331, 662, 993, 1986	8	3984	1998	Composite	Abundant
1987	1, 1987	2	1988	1	Prime	Deficient
1988	1, 2, 4, 7, 14, 28, 71, 142, 284, 497, 994, 1988	12	4032	2044	Composite	Abundant
1989	1, 3, 9, 13, 17, 39, 51, 117, 153, 221, 663, 1989	12	3276	1287	Composite	Deficient
1990	1, 2, 5, 10, 199, 398, 995, 1990	8	3600	1610	Composite	Deficient
1991	1, 11, 181, 1991	4	2184	193	Composite	Deficient
1992	1, 2, 3, 4, 6, 8, 12, 24, 83, 166, 249, 332, 498, 664, 996, 1992	16	5040	3048	Composite	Abundant
1993	1, 1993	2	1994	1	Prime	Deficient
1994	1, 2, 997, 1994	4	2994	1000	Composite	Deficient
1995	1, 3, 5, 7, 15, 19, 21, 35, 57, 95, 105, 133, 285, 399, 665, 1995	16	3840	1845	Composite	Deficient
1996	1, 2, 4, 499, 998, 1996	6	3500	1504	Composite	Deficient
1997	1, 1997	2	1998	1	Prime	Deficient
1998	1, 2, 3, 6, 9, 18, 27, 37, 54, 74, 111, 222, 333, 666, 999, 1998	16	4560	2562	Composite	Abundant
1999	1, 1999	2	2000	1	Prime	Deficient
2000	1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 200, 250, 400, 500, 1000, 2000	20	4836	2836	Composite	Abundant