Compare 1638 vs 1644
| Property | 1638 | 1644 |
|---|---|---|
| Type | composite number | composite number |
| Unique factors | 4 | 3 |
| Total factors | 5 | 4 |
| Prime factorization | 21 × 32 × 71 × 131 | 22 × 31 × 1371 |
| Prime factorization | 2 × 3 × 3 × 7 × 13 | 2 × 2 × 3 × 137 |
| Divisors count | 24 | 12 |
| Divisors | 1, 2, 3, 6, 7, 9, 13, 14, 18, 21, 26, 39, 42, 63, 78, 91, 117, 126, 182, 234, 273, 546, 819, 1638 | 1, 2, 3, 4, 6, 12, 137, 274, 411, 548, 822, 1644 |
| Number of properties | 0 | 0 |
| Roman numberals | MDCXXXVIII | MDCXLIV |
| Base 2 | 110011001102 | 110011011002 |
| Base 3 | 20202003 | 20202203 |
| Base 4 | 1212124 | 1212304 |
| Base 5 | 230235 | 230345 |
| Base 6 | 113306 | 113406 |
| Base 7 | 45307 | 45367 |
| Base 8 | 31468 | 31548 |
| Base 9 | 22209 | 22269 |
| Base 10 | 163810 | 164410 |
| Base 11 | 125a11 | 126511 |
| Base 12 | b4612 | b5012 |
| Base 13 | 99013 | 99613 |
| Base 14 | 85014 | 85614 |
| Base 15 | 74315 | 74915 |
| Base 16 | 66616 | 66c16 |