Compare 21640 vs 21647
| Property | 21640 | 21647 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 3 | 1 |
| Total factors | 5 | 1 |
| Prime factorization | 23 × 51 × 5411 | 216471 |
| Prime factorization | 2 × 2 × 2 × 5 × 541 | 21647 |
| Divisors count | 16 | 2 |
| Divisors | 1, 2, 4, 5, 8, 10, 20, 40, 541, 1082, 2164, 2705, 4328, 5410, 10820, 21640 | 1, 21647 |
| Number of properties | 0 | 4 |
| Chen primes | 1193rd | |
| Long primes | 918th | |
| Primes | 2430th | |
| Twin primes (1st member) | 370th | |
| Roman numberals | ||
| Base 2 | 1010100100010002 | 1010100100011112 |
| Base 3 | 10022001113 | 10022002023 |
| Base 4 | 111020204 | 111020334 |
| Base 5 | 11430305 | 11430425 |
| Base 6 | 2441046 | 2441156 |
| Base 7 | 1200437 | 1200537 |
| Base 8 | 522108 | 522178 |
| Base 9 | 326149 | 326229 |
| Base 10 | 2164010 | 2164710 |
| Base 11 | 1529311 | 1529a11 |
| Base 12 | 1063412 | 1063b12 |
| Base 13 | 9b0813 | 9b1213 |
| Base 14 | 7c5a14 | 7c6314 |
| Base 15 | 662a15 | 663215 |
| Base 16 | 548816 | 548f16 |