Compare 15 vs 40
| Property | 15 | 40 |
|---|---|---|
| Type | semiprime | composite number |
| Unique factors | 2 | 2 |
| Total factors | 2 | 4 |
| Prime factorization | 31 × 51 | 23 × 51 |
| Prime factorization | 3 × 5 | 2 × 2 × 2 × 5 |
| Divisors count | 4 | 8 |
| Divisors | 1, 3, 5, 15 | 1, 2, 4, 5, 8, 10, 20, 40 |
| Number of properties | 1 | 0 |
| Semiprimes | 6th | |
| Roman numberals | XV | XL |
| Base 2 | 11112 | 1010002 |
| Base 3 | 1203 | 11113 |
| Base 4 | 334 | 2204 |
| Base 5 | 305 | 1305 |
| Base 6 | 236 | 1046 |
| Base 7 | 217 | 557 |
| Base 8 | 178 | 508 |
| Base 9 | 169 | 449 |
| Base 10 | 1510 | 4010 |
| Base 11 | 1411 | 3711 |
| Base 12 | 1312 | 3412 |
| Base 13 | 1213 | 3113 |
| Base 14 | 1114 | 2c14 |
| Base 15 | 1015 | 2a15 |
| Base 16 | f16 | 2816 |