Compare 81 vs 81
| Property | 81 | 81 |
|---|---|---|
| Type | composite number | composite number |
| Unique factors | 1 | 1 |
| Total factors | 4 | 4 |
| Prime factorization | 34 | 34 |
| Prime factorization | 3 × 3 × 3 × 3 | 3 × 3 × 3 × 3 |
| Divisors count | 5 | 5 |
| Divisors | 1, 3, 9, 27, 81 | 1, 3, 9, 27, 81 |
| Number of properties | 0 | 0 |
| Roman numberals | LXXXI | LXXXI |
| Base 2 | 10100012 | 10100012 |
| Base 3 | 100003 | 100003 |
| Base 4 | 11014 | 11014 |
| Base 5 | 3115 | 3115 |
| Base 6 | 2136 | 2136 |
| Base 7 | 1447 | 1447 |
| Base 8 | 1218 | 1218 |
| Base 9 | 1009 | 1009 |
| Base 10 | 8110 | 8110 |
| Base 11 | 7411 | 7411 |
| Base 12 | 6912 | 6912 |
| Base 13 | 6313 | 6313 |
| Base 14 | 5b14 | 5b14 |
| Base 15 | 5615 | 5615 |
| Base 16 | 5116 | 5116 |