Positive Integers » 80001-90000 » 81901-82000 » 81991
Divisors of the Positive Integer 81991
1, 7, 13, 17, 53, 91, 119, 221, 371, 689, 901, 1547, 4823, 6307, 11713, 81991Sum of all the Divisors of 81991, including itself
108864Sum of the Proper Divisors of 81991
26873Properties of the number 81991
The integer 81991 is an odd number.The integer 81991 is a Composite number.
26873 is less than 81991, so 81991 is a deficient number.
The number 81991 as a Roman Numeral
_L_X_X_XMCMXCI (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 81991 in various Numeral Systems
| Base | Representation |
|---|---|
| 2: | 10100000001000111 |
| 3: | 11011110201 |
| 4: | 110001013 |
| 5: | 10110431 |
| 6: | 1431331 |
| 7: | 461020 |
| 8: | 240107 |
| 9: | 134421 |
| 10: | 81991 |
| 11: | 56668 |
| 12: | 3B547 |
| 13: | 2B420 |
| 14: | 21C47 |
| 15: | 19461 |
| 16: | 14047 |
| 17: | GBC0 |
| 18: | E111 |
| 19: | BI26 |
| 20: | A4JB |
| 21: | 8HJ7 |
| 22: | 7F8J |
| 23: | 6GMJ |
| 24: | 5M87 |
| 25: | 564G |
| 26: | 4H7D |
| 27: | 44CJ |
| 28: | 3KG7 |
| 29: | 3AE8 |
| 30: | 3131 |
| 31: | 2N9R |
| 32: | 2G27 |
| 33: | 299J |
| 34: | 22VH |
| 35: | 1VWL |
| 36: | 1R9J |