Compare 21840 vs 21851
| Property | 21840 | 21851 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 5 | 1 |
| Total factors | 8 | 1 |
| Prime factorization | 24 × 31 × 51 × 71 × 131 | 218511 |
| Prime factorization | 2 × 2 × 2 × 2 × 3 × 5 × 7 × 13 | 21851 |
| Divisors count | 80 | 2 |
| Divisors | 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 13, 14, 15, 16, 20, 21, 24, 26, 28, 30, 35, 39, 40, 42, 48, 52, 56, 60, 65, 70, 78, 80, 84, 91, 104, 105, 112, 120, 130, 140, 156, 168, 182, 195, 208, 210, 240, 260, 273, 280, 312, 336, 364, 390, 420, 455, 520, 546, 560, 624, 728, 780, 840, 910, 1040, 1092, 1365, 1456, 1560, 1680, 1820, 2184, 2730, 3120, 3640, 4368, 5460, 7280, 10920, 21840 | 1, 21851 |
| Number of properties | 0 | 4 |
| Additive primes | 1134th | |
| Isolated primes | 1708th | |
| Long primes | 927th | |
| Primes | 2451st | |
| Roman numberals | ||
| Base 2 | 1010101010100002 | 1010101010110112 |
| Base 3 | 10022212203 | 10022220223 |
| Base 4 | 111111004 | 111111234 |
| Base 5 | 11443305 | 11444015 |
| Base 6 | 2450406 | 2450556 |
| Base 7 | 1204507 | 1204647 |
| Base 8 | 525208 | 525338 |
| Base 9 | 328569 | 328689 |
| Base 10 | 2184010 | 2185110 |
| Base 11 | 1545511 | 1546511 |
| Base 12 | 1078012 | 1078b12 |
| Base 13 | 9c3013 | 9c3b13 |
| Base 14 | 7d6014 | 7d6b14 |
| Base 15 | 671015 | 671b15 |
| Base 16 | 555016 | 555b16 |