Positive Integers » 20001-30000 » 21901-22000 » 21987
Divisors of the Positive Integer 21987
1, 3, 7, 9, 21, 63, 349, 1047, 2443, 3141, 7329, 21987Sum of all the Divisors of 21987, including itself
36400Sum of the Proper Divisors of 21987
14413Properties of the number 21987
The integer 21987 is an odd number.The integer 21987 is a Composite number.
14413 is less than 21987, so 21987 is a deficient number.
The number 21987 as a Roman Numeral
_X_XMCMLXXXVII (Roman Numerals with underscores in front have their values increased by 1,000. The underscore represents a line over the numeral, because the Romans used overlines to multiply by 1,000.)The number 21987 in various Numeral Systems
| Base | Representation |
|---|---|
| 2: | 101010111100011 |
| 3: | 1010011100 |
| 4: | 11113203 |
| 5: | 1200422 |
| 6: | 245443 |
| 7: | 121050 |
| 8: | 52743 |
| 9: | 33140 |
| 10: | 21987 |
| 11: | 15579 |
| 12: | 10883 |
| 13: | A014 |
| 14: | 8027 |
| 15: | 67AC |
| 16: | 55E3 |
| 17: | 4816 |
| 18: | 3DF9 |
| 19: | 33H4 |
| 20: | 2EJ7 |
| 21: | 27I0 |
| 22: | 2199 |
| 23: | 1ICM |
| 24: | 1E43 |
| 25: | 1A4C |
| 26: | 16DH |
| 27: | 1349 |
| 28: | 1017 |
| 29: | Q45 |
| 30: | OCR |
| 31: | MR8 |
| 32: | LF3 |
| 33: | K69 |
| 34: | J0N |
| 35: | HX7 |
| 36: | GYR |