Compare 1644 vs 1645
| Property | 1644 | 1645 |
|---|---|---|
| Type | composite number | composite number |
| Unique factors | 3 | 3 |
| Total factors | 4 | 3 |
| Prime factorization | 22 × 31 × 1371 | 51 × 71 × 471 |
| Prime factorization | 2 × 2 × 3 × 137 | 5 × 7 × 47 |
| Divisors count | 12 | 8 |
| Divisors | 1, 2, 3, 4, 6, 12, 137, 274, 411, 548, 822, 1644 | 1, 5, 7, 35, 47, 235, 329, 1645 |
| Number of properties | 0 | 0 |
| Roman numberals | MDCXLIV | MDCXLV |
| Base 2 | 110011011002 | 110011011012 |
| Base 3 | 20202203 | 20202213 |
| Base 4 | 1212304 | 1212314 |
| Base 5 | 230345 | 230405 |
| Base 6 | 113406 | 113416 |
| Base 7 | 45367 | 45407 |
| Base 8 | 31548 | 31558 |
| Base 9 | 22269 | 22279 |
| Base 10 | 164410 | 164510 |
| Base 11 | 126511 | 126611 |
| Base 12 | b5012 | b5112 |
| Base 13 | 99613 | 99713 |
| Base 14 | 85614 | 85714 |
| Base 15 | 74915 | 74a15 |
| Base 16 | 66c16 | 66d16 |