The Integers 1801 to 1900

• 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
1801	1, 1801	2	1802	1	Prime	Deficient
1802	1, 2, 17, 34, 53, 106, 901, 1802	8	2916	1114	Composite	Deficient
1803	1, 3, 601, 1803	4	2408	605	Composite	Deficient
1804	1, 2, 4, 11, 22, 41, 44, 82, 164, 451, 902, 1804	12	3528	1724	Composite	Deficient
1805	1, 5, 19, 95, 361, 1805	6	2286	481	Composite	Deficient
1806	1, 2, 3, 6, 7, 14, 21, 42, 43, 86, 129, 258, 301, 602, 903, 1806	16	4224	2418	Composite	Abundant
1807	1, 13, 139, 1807	4	1960	153	Composite	Deficient
1808	1, 2, 4, 8, 16, 113, 226, 452, 904, 1808	10	3534	1726	Composite	Deficient
1809	1, 3, 9, 27, 67, 201, 603, 1809	8	2720	911	Composite	Deficient
1810	1, 2, 5, 10, 181, 362, 905, 1810	8	3276	1466	Composite	Deficient
1811	1, 1811	2	1812	1	Prime	Deficient
1812	1, 2, 3, 4, 6, 12, 151, 302, 453, 604, 906, 1812	12	4256	2444	Composite	Abundant
1813	1, 7, 37, 49, 259, 1813	6	2166	353	Composite	Deficient
1814	1, 2, 907, 1814	4	2724	910	Composite	Deficient
1815	1, 3, 5, 11, 15, 33, 55, 121, 165, 363, 605, 1815	12	3192	1377	Composite	Deficient
1816	1, 2, 4, 8, 227, 454, 908, 1816	8	3420	1604	Composite	Deficient
1817	1, 23, 79, 1817	4	1920	103	Composite	Deficient
1818	1, 2, 3, 6, 9, 18, 101, 202, 303, 606, 909, 1818	12	3978	2160	Composite	Abundant
1819	1, 17, 107, 1819	4	1944	125	Composite	Deficient
1820	1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 65, 70, 91, 130, 140, 182, 260, 364, 455, 910, 1820	24	4704	2884	Composite	Abundant
1821	1, 3, 607, 1821	4	2432	611	Composite	Deficient
1822	1, 2, 911, 1822	4	2736	914	Composite	Deficient
1823	1, 1823	2	1824	1	Prime	Deficient
1824	1, 2, 3, 4, 6, 8, 12, 16, 19, 24, 32, 38, 48, 57, 76, 96, 114, 152, 228, 304, 456, 608, 912, 1824	24	5040	3216	Composite	Abundant
1825	1, 5, 25, 73, 365, 1825	6	2294	469	Composite	Deficient
1826	1, 2, 11, 22, 83, 166, 913, 1826	8	3024	1198	Composite	Deficient
1827	1, 3, 7, 9, 21, 29, 63, 87, 203, 261, 609, 1827	12	3120	1293	Composite	Deficient
1828	1, 2, 4, 457, 914, 1828	6	3206	1378	Composite	Deficient
1829	1, 31, 59, 1829	4	1920	91	Composite	Deficient
1830	1, 2, 3, 5, 6, 10, 15, 30, 61, 122, 183, 305, 366, 610, 915, 1830	16	4464	2634	Composite	Abundant
1831	1, 1831	2	1832	1	Prime	Deficient
1832	1, 2, 4, 8, 229, 458, 916, 1832	8	3450	1618	Composite	Deficient
1833	1, 3, 13, 39, 47, 141, 611, 1833	8	2688	855	Composite	Deficient
1834	1, 2, 7, 14, 131, 262, 917, 1834	8	3168	1334	Composite	Deficient
1835	1, 5, 367, 1835	4	2208	373	Composite	Deficient
1836	1, 2, 3, 4, 6, 9, 12, 17, 18, 27, 34, 36, 51, 54, 68, 102, 108, 153, 204, 306, 459, 612, 918, 1836	24	5040	3204	Composite	Abundant
1837	1, 11, 167, 1837	4	2016	179	Composite	Deficient
1838	1, 2, 919, 1838	4	2760	922	Composite	Deficient
1839	1, 3, 613, 1839	4	2456	617	Composite	Deficient
1840	1, 2, 4, 5, 8, 10, 16, 20, 23, 40, 46, 80, 92, 115, 184, 230, 368, 460, 920, 1840	20	4464	2624	Composite	Abundant
1841	1, 7, 263, 1841	4	2112	271	Composite	Deficient
1842	1, 2, 3, 6, 307, 614, 921, 1842	8	3696	1854	Composite	Abundant
1843	1, 19, 97, 1843	4	1960	117	Composite	Deficient
1844	1, 2, 4, 461, 922, 1844	6	3234	1390	Composite	Deficient
1845	1, 3, 5, 9, 15, 41, 45, 123, 205, 369, 615, 1845	12	3276	1431	Composite	Deficient
1846	1, 2, 13, 26, 71, 142, 923, 1846	8	3024	1178	Composite	Deficient
1847	1, 1847	2	1848	1	Prime	Deficient
1848	1, 2, 3, 4, 6, 7, 8, 11, 12, 14, 21, 22, 24, 28, 33, 42, 44, 56, 66, 77, 84, 88, 132, 154, 168, 231, 264, 308, 462, 616, 924, 1848	32	5760	3912	Composite	Abundant
1849	1, 43, 1849	3	1893	44	Composite	Deficient
1850	1, 2, 5, 10, 25, 37, 50, 74, 185, 370, 925, 1850	12	3534	1684	Composite	Deficient
1851	1, 3, 617, 1851	4	2472	621	Composite	Deficient
1852	1, 2, 4, 463, 926, 1852	6	3248	1396	Composite	Deficient
1853	1, 17, 109, 1853	4	1980	127	Composite	Deficient
1854	1, 2, 3, 6, 9, 18, 103, 206, 309, 618, 927, 1854	12	4056	2202	Composite	Abundant
1855	1, 5, 7, 35, 53, 265, 371, 1855	8	2592	737	Composite	Deficient
1856	1, 2, 4, 8, 16, 29, 32, 58, 64, 116, 232, 464, 928, 1856	14	3810	1954	Composite	Abundant
1857	1, 3, 619, 1857	4	2480	623	Composite	Deficient
1858	1, 2, 929, 1858	4	2790	932	Composite	Deficient
1859	1, 11, 13, 143, 169, 1859	6	2196	337	Composite	Deficient
1860	1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 31, 60, 62, 93, 124, 155, 186, 310, 372, 465, 620, 930, 1860	24	5376	3516	Composite	Abundant
1861	1, 1861	2	1862	1	Prime	Deficient
1862	1, 2, 7, 14, 19, 38, 49, 98, 133, 266, 931, 1862	12	3420	1558	Composite	Deficient
1863	1, 3, 9, 23, 27, 69, 81, 207, 621, 1863	10	2904	1041	Composite	Deficient
1864	1, 2, 4, 8, 233, 466, 932, 1864	8	3510	1646	Composite	Deficient
1865	1, 5, 373, 1865	4	2244	379	Composite	Deficient
1866	1, 2, 3, 6, 311, 622, 933, 1866	8	3744	1878	Composite	Abundant
1867	1, 1867	2	1868	1	Prime	Deficient
1868	1, 2, 4, 467, 934, 1868	6	3276	1408	Composite	Deficient
1869	1, 3, 7, 21, 89, 267, 623, 1869	8	2880	1011	Composite	Deficient
1870	1, 2, 5, 10, 11, 17, 22, 34, 55, 85, 110, 170, 187, 374, 935, 1870	16	3888	2018	Composite	Abundant
1871	1, 1871	2	1872	1	Prime	Deficient
1872	1, 2, 3, 4, 6, 8, 9, 12, 13, 16, 18, 24, 26, 36, 39, 48, 52, 72, 78, 104, 117, 144, 156, 208, 234, 312, 468, 624, 936, 1872	30	5642	3770	Composite	Abundant
1873	1, 1873	2	1874	1	Prime	Deficient
1874	1, 2, 937, 1874	4	2814	940	Composite	Deficient
1875	1, 3, 5, 15, 25, 75, 125, 375, 625, 1875	10	3124	1249	Composite	Deficient
1876	1, 2, 4, 7, 14, 28, 67, 134, 268, 469, 938, 1876	12	3808	1932	Composite	Abundant
1877	1, 1877	2	1878	1	Prime	Deficient
1878	1, 2, 3, 6, 313, 626, 939, 1878	8	3768	1890	Composite	Abundant
1879	1, 1879	2	1880	1	Prime	Deficient
1880	1, 2, 4, 5, 8, 10, 20, 40, 47, 94, 188, 235, 376, 470, 940, 1880	16	4320	2440	Composite	Abundant
1881	1, 3, 9, 11, 19, 33, 57, 99, 171, 209, 627, 1881	12	3120	1239	Composite	Deficient
1882	1, 2, 941, 1882	4	2826	944	Composite	Deficient
1883	1, 7, 269, 1883	4	2160	277	Composite	Deficient
1884	1, 2, 3, 4, 6, 12, 157, 314, 471, 628, 942, 1884	12	4424	2540	Composite	Abundant
1885	1, 5, 13, 29, 65, 145, 377, 1885	8	2520	635	Composite	Deficient
1886	1, 2, 23, 41, 46, 82, 943, 1886	8	3024	1138	Composite	Deficient
1887	1, 3, 17, 37, 51, 111, 629, 1887	8	2736	849	Composite	Deficient
1888	1, 2, 4, 8, 16, 32, 59, 118, 236, 472, 944, 1888	12	3780	1892	Composite	Abundant
1889	1, 1889	2	1890	1	Prime	Deficient
1890	1, 2, 3, 5, 6, 7, 9, 10, 14, 15, 18, 21, 27, 30, 35, 42, 45, 54, 63, 70, 90, 105, 126, 135, 189, 210, 270, 315, 378, 630, 945, 1890	32	5760	3870	Composite	Abundant
1891	1, 31, 61, 1891	4	1984	93	Composite	Deficient
1892	1, 2, 4, 11, 22, 43, 44, 86, 172, 473, 946, 1892	12	3696	1804	Composite	Deficient
1893	1, 3, 631, 1893	4	2528	635	Composite	Deficient
1894	1, 2, 947, 1894	4	2844	950	Composite	Deficient
1895	1, 5, 379, 1895	4	2280	385	Composite	Deficient
1896	1, 2, 3, 4, 6, 8, 12, 24, 79, 158, 237, 316, 474, 632, 948, 1896	16	4800	2904	Composite	Abundant
1897	1, 7, 271, 1897	4	2176	279	Composite	Deficient
1898	1, 2, 13, 26, 73, 146, 949, 1898	8	3108	1210	Composite	Deficient
1899	1, 3, 9, 211, 633, 1899	6	2756	857	Composite	Deficient
1900	1, 2, 4, 5, 10, 19, 20, 25, 38, 50, 76, 95, 100, 190, 380, 475, 950, 1900	18	4340	2440	Composite	Abundant