Divisors of the Positive Integer 1981
1, 7, 283, 1981Sum of all the Divisors of 1981, including itself
2272Sum of the Proper Divisors of 1981
291Properties of the number 1981
The integer 1981 is an odd number.The integer 1981 is a Composite number.
291 is less than 1981, so 1981 is a deficient number.
The number 1981 as a Roman Numeral
MCMLXXXIThe number 1981 in various Numeral Systems
| Base | Representation |
|---|---|
| 2: | 11110111101 |
| 3: | 2201101 |
| 4: | 132331 |
| 5: | 30411 |
| 6: | 13101 |
| 7: | 5530 |
| 8: | 3675 |
| 9: | 2641 |
| 10: | 1981 |
| 11: | 1541 |
| 12: | 1191 |
| 13: | B95 |
| 14: | A17 |
| 15: | 8C1 |
| 16: | 7BD |
| 17: | 6E9 |
| 18: | 621 |
| 19: | 595 |
| 20: | 4J1 |
| 21: | 4A7 |
| 22: | 421 |
| 23: | 3H3 |
| 24: | 3AD |
| 25: | 346 |
| 26: | 2O5 |
| 27: | 2JA |
| 28: | 2EL |
| 29: | 2A9 |
| 30: | 261 |
| 31: | 21S |
| 32: | 1TT |
| 33: | 1R1 |
| 34: | 1O9 |
| 35: | 1LL |
| 36: | 1J1 |