Compare 21978 vs 21989
| Property | 21978 | 21989 |
|---|---|---|
| Type | composite number | semiprime |
| Unique factors | 4 | 2 |
| Total factors | 6 | 2 |
| Prime factorization | 21 × 33 × 111 × 371 | 111 × 19991 |
| Prime factorization | 2 × 3 × 3 × 3 × 11 × 37 | 11 × 1999 |
| Divisors count | 32 | 4 |
| Divisors | 1, 2, 3, 6, 9, 11, 18, 22, 27, 33, 37, 54, 66, 74, 99, 111, 198, 222, 297, 333, 407, 594, 666, 814, 999, 1221, 1998, 2442, 3663, 7326, 10989, 21978 | 1, 11, 1999, 21989 |
| Number of properties | 0 | 1 |
| Semiprimes | 5552nd | |
| Roman numberals | ||
| Base 2 | 1010101110110102 | 1010101111001012 |
| Base 3 | 10100110003 | 10100111023 |
| Base 4 | 111131224 | 111132114 |
| Base 5 | 12004035 | 12004245 |
| Base 6 | 2454306 | 2454456 |
| Base 7 | 1210357 | 1210527 |
| Base 8 | 527328 | 527458 |
| Base 9 | 331309 | 331429 |
| Base 10 | 2197810 | 2198910 |
| Base 11 | 1557011 | 1558011 |
| Base 12 | 1087612 | 1088512 |
| Base 13 | a00813 | a01613 |
| Base 14 | 801c14 | 802914 |
| Base 15 | 67a315 | 67ae15 |
| Base 16 | 55da16 | 55e516 |