Compare 1642 vs 1644
| Property | 1642 | 1644 |
|---|---|---|
| Type | semiprime | composite number |
| Unique factors | 2 | 3 |
| Total factors | 2 | 4 |
| Prime factorization | 21 × 8211 | 22 × 31 × 1371 |
| Prime factorization | 2 × 821 | 2 × 2 × 3 × 137 |
| Divisors count | 4 | 12 |
| Divisors | 1, 2, 821, 1642 | 1, 2, 3, 4, 6, 12, 137, 274, 411, 548, 822, 1644 |
| Number of properties | 1 | 0 |
| Semiprimes | 471st | |
| Roman numberals | MDCXLII | MDCXLIV |
| Base 2 | 110011010102 | 110011011002 |
| Base 3 | 20202113 | 20202203 |
| Base 4 | 1212224 | 1212304 |
| Base 5 | 230325 | 230345 |
| Base 6 | 113346 | 113406 |
| Base 7 | 45347 | 45367 |
| Base 8 | 31528 | 31548 |
| Base 9 | 22249 | 22269 |
| Base 10 | 164210 | 164410 |
| Base 11 | 126311 | 126511 |
| Base 12 | b4a12 | b5012 |
| Base 13 | 99413 | 99613 |
| Base 14 | 85414 | 85614 |
| Base 15 | 74715 | 74915 |
| Base 16 | 66a16 | 66c16 |