Compare 15 vs 63
| Property | 15 | 63 |
|---|---|---|
| Type | semiprime | composite number |
| Unique factors | 2 | 2 |
| Total factors | 2 | 3 |
| Prime factorization | 31 × 51 | 32 × 71 |
| Prime factorization | 3 × 5 | 3 × 3 × 7 |
| Divisors count | 4 | 6 |
| Divisors | 1, 3, 5, 15 | 1, 3, 7, 9, 21, 63 |
| Number of properties | 1 | 0 |
| Semiprimes | 6th | |
| Roman numberals | XV | LXIII |
| Base 2 | 11112 | 1111112 |
| Base 3 | 1203 | 21003 |
| Base 4 | 334 | 3334 |
| Base 5 | 305 | 2235 |
| Base 6 | 236 | 1436 |
| Base 7 | 217 | 1207 |
| Base 8 | 178 | 778 |
| Base 9 | 169 | 709 |
| Base 10 | 1510 | 6310 |
| Base 11 | 1411 | 5811 |
| Base 12 | 1312 | 5312 |
| Base 13 | 1213 | 4b13 |
| Base 14 | 1114 | 4714 |
| Base 15 | 1015 | 4315 |
| Base 16 | f16 | 3f16 |
