Compare 78 vs 81
| Property | 78 | 81 |
|---|---|---|
| Type | composite number | composite number |
| Unique factors | 3 | 1 |
| Total factors | 3 | 4 |
| Prime factorization | 21 × 31 × 131 | 34 |
| Prime factorization | 2 × 3 × 13 | 3 × 3 × 3 × 3 |
| Divisors count | 8 | 5 |
| Divisors | 1, 2, 3, 6, 13, 26, 39, 78 | 1, 3, 9, 27, 81 |
| Number of properties | 0 | 0 |
| Roman numberals | LXXVIII | LXXXI |
| Base 2 | 10011102 | 10100012 |
| Base 3 | 22203 | 100003 |
| Base 4 | 10324 | 11014 |
| Base 5 | 3035 | 3115 |
| Base 6 | 2106 | 2136 |
| Base 7 | 1417 | 1447 |
| Base 8 | 1168 | 1218 |
| Base 9 | 869 | 1009 |
| Base 10 | 7810 | 8110 |
| Base 11 | 7111 | 7411 |
| Base 12 | 6612 | 6912 |
| Base 13 | 6013 | 6313 |
| Base 14 | 5814 | 5b14 |
| Base 15 | 5315 | 5615 |
| Base 16 | 4e16 | 5116 |