Compare 15 vs 57
| Property | 15 | 57 |
|---|---|---|
| Type | semiprime | semiprime |
| Unique factors | 2 | 2 |
| Total factors | 2 | 2 |
| Prime factorization | 31 × 51 | 31 × 191 |
| Prime factorization | 3 × 5 | 3 × 19 |
| Divisors count | 4 | 4 |
| Divisors | 1, 3, 5, 15 | 1, 3, 19, 57 |
| Number of properties | 1 | 1 |
| Semiprimes | 6th | 20th |
| Roman numberals | XV | LVII |
| Base 2 | 11112 | 1110012 |
| Base 3 | 1203 | 20103 |
| Base 4 | 334 | 3214 |
| Base 5 | 305 | 2125 |
| Base 6 | 236 | 1336 |
| Base 7 | 217 | 1117 |
| Base 8 | 178 | 718 |
| Base 9 | 169 | 639 |
| Base 10 | 1510 | 5710 |
| Base 11 | 1411 | 5211 |
| Base 12 | 1312 | 4912 |
| Base 13 | 1213 | 4513 |
| Base 14 | 1114 | 4114 |
| Base 15 | 1015 | 3c15 |
| Base 16 | f16 | 3916 |