Compare 645 vs 656
| Property | 645 | 656 |
|---|---|---|
| Type | composite number | composite number |
| Unique factors | 3 | 2 |
| Total factors | 3 | 5 |
| Prime factorization | 31 × 51 × 431 | 24 × 411 |
| Prime factorization | 3 × 5 × 43 | 2 × 2 × 2 × 2 × 41 |
| Divisors count | 8 | 10 |
| Divisors | 1, 3, 5, 15, 43, 129, 215, 645 | 1, 2, 4, 8, 16, 41, 82, 164, 328, 656 |
| Number of properties | 0 | 0 |
| Roman numberals | DCXLV | DCLVI |
| Base 2 | 10100001012 | 10100100002 |
| Base 3 | 2122203 | 2200223 |
| Base 4 | 220114 | 221004 |
| Base 5 | 100405 | 101115 |
| Base 6 | 25536 | 30126 |
| Base 7 | 16117 | 16257 |
| Base 8 | 12058 | 12208 |
| Base 9 | 7869 | 8089 |
| Base 10 | 64510 | 65610 |
| Base 11 | 53711 | 54711 |
| Base 12 | 45912 | 46812 |
| Base 13 | 3a813 | 3b613 |
| Base 14 | 34114 | 34c14 |
| Base 15 | 2d015 | 2db15 |
| Base 16 | 28516 | 29016 |