Compare 9 vs 15
| Property | 9 | 15 |
|---|---|---|
| Type | semiprime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 2 | 2 |
| Prime factorization | 32 | 31 × 51 |
| Prime factorization | 3 × 3 | 3 × 5 |
| Divisors count | 3 | 4 |
| Divisors | 1, 3, 9 | 1, 3, 5, 15 |
| Number of properties | 1 | 1 |
| Semiprimes | 3rd | 6th |
| Roman numberals | IX | XV |
| Base 2 | 10012 | 11112 |
| Base 3 | 1003 | 1203 |
| Base 4 | 214 | 334 |
| Base 5 | 145 | 305 |
| Base 6 | 136 | 236 |
| Base 7 | 127 | 217 |
| Base 8 | 118 | 178 |
| Base 9 | 109 | 169 |
| Base 10 | 910 | 1510 |
| Base 11 | 911 | 1411 |
| Base 12 | 912 | 1312 |
| Base 13 | 913 | 1213 |
| Base 14 | 914 | 1114 |
| Base 15 | 915 | 1015 |
| Base 16 | 916 | f16 |