Compare 21839 vs 21840
| Property | 21839 | 21840 |
|---|---|---|
| Type | prime | composite number |
| Unique factors | 1 | 5 |
| Total factors | 1 | 8 |
| Prime factorization | 218391 | 24 × 31 × 51 × 71 × 131 |
| Prime factorization | 21839 | 2 × 2 × 2 × 2 × 3 × 5 × 7 × 13 |
| Divisors count | 2 | 80 |
| Divisors | 1, 21839 | 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 |
| Number of properties | 5 | 0 |
| Additive primes | 1133rd | |
| Chen primes | 1202nd | |
| Harmonic primes | 902nd | |
| Primes | 2449th | |
| Twin primes (1st member) | 372nd | |
| Roman numberals | ||
| Base 2 | 1010101010011112 | 1010101010100002 |
| Base 3 | 10022212123 | 10022212203 |
| Base 4 | 111110334 | 111111004 |
| Base 5 | 11443245 | 11443305 |
| Base 6 | 2450356 | 2450406 |
| Base 7 | 1204467 | 1204507 |
| Base 8 | 525178 | 525208 |
| Base 9 | 328559 | 328569 |
| Base 10 | 2183910 | 2184010 |
| Base 11 | 1545411 | 1545511 |
| Base 12 | 1077b12 | 1078012 |
| Base 13 | 9c2c13 | 9c3013 |
| Base 14 | 7d5d14 | 7d6014 |
| Base 15 | 670e15 | 671015 |
| Base 16 | 554f16 | 555016 |