Compare 644 vs 656
| Property | 644 | 656 |
|---|---|---|
| Type | composite number | composite number |
| Unique factors | 3 | 2 |
| Total factors | 4 | 5 |
| Prime factorization | 22 × 71 × 231 | 24 × 411 |
| Prime factorization | 2 × 2 × 7 × 23 | 2 × 2 × 2 × 2 × 41 |
| Divisors count | 12 | 10 |
| Divisors | 1, 2, 4, 7, 14, 23, 28, 46, 92, 161, 322, 644 | 1, 2, 4, 8, 16, 41, 82, 164, 328, 656 |
| Number of properties | 0 | 0 |
| Roman numberals | DCXLIV | DCLVI |
| Base 2 | 10100001002 | 10100100002 |
| Base 3 | 2122123 | 2200223 |
| Base 4 | 220104 | 221004 |
| Base 5 | 100345 | 101115 |
| Base 6 | 25526 | 30126 |
| Base 7 | 16107 | 16257 |
| Base 8 | 12048 | 12208 |
| Base 9 | 7859 | 8089 |
| Base 10 | 64410 | 65610 |
| Base 11 | 53611 | 54711 |
| Base 12 | 45812 | 46812 |
| Base 13 | 3a713 | 3b613 |
| Base 14 | 34014 | 34c14 |
| Base 15 | 2ce15 | 2db15 |
| Base 16 | 28416 | 29016 |