Divisors of the Positive Integer 1991
1, 11, 181, 1991Sum of all the Divisors of 1991, including itself
2184Sum of the Proper Divisors of 1991
193Properties of the number 1991
The integer 1991 is an odd number.The integer 1991 is a Composite number.
193 is less than 1991, so 1991 is a deficient number.
The number 1991 as a Roman Numeral
MCMXCIThe number 1991 in various Numeral Systems
| Base | Representation |
|---|---|
| 2: | 11111000111 |
| 3: | 2201202 |
| 4: | 133013 |
| 5: | 30431 |
| 6: | 13115 |
| 7: | 5543 |
| 8: | 3707 |
| 9: | 2652 |
| 10: | 1991 |
| 11: | 1550 |
| 12: | 119B |
| 13: | BA2 |
| 14: | A23 |
| 15: | 8CB |
| 16: | 7C7 |
| 17: | 6F2 |
| 18: | 62B |
| 19: | 59F |
| 20: | 4JB |
| 21: | 4AH |
| 22: | 42B |
| 23: | 3HD |
| 24: | 3AN |
| 25: | 34G |
| 26: | 2OF |
| 27: | 2JK |
| 28: | 2F3 |
| 29: | 2AJ |
| 30: | 26B |
| 31: | 227 |
| 32: | 1U7 |
| 33: | 1RB |
| 34: | 1OJ |
| 35: | 1LV |
| 36: | 1JB |