Compare 21640 vs 21649
| Property | 21640 | 21649 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 3 | 1 |
| Total factors | 5 | 1 |
| Prime factorization | 23 × 51 × 5411 | 216491 |
| Prime factorization | 2 × 2 × 2 × 5 × 541 | 21649 |
| Divisors count | 16 | 2 |
| Divisors | 1, 2, 4, 5, 8, 10, 20, 40, 541, 1082, 2164, 2705, 4328, 5410, 10820, 21640 | 1, 21649 |
| Number of properties | 0 | 3 |
| Primes | 2431st | |
| Pythagorean primes | 1206th | |
| Twin primes (2nd member) | 370th | |
| Roman numberals | ||
| Base 2 | 1010100100010002 | 1010100100100012 |
| Base 3 | 10022001113 | 10022002113 |
| Base 4 | 111020204 | 111021014 |
| Base 5 | 11430305 | 11430445 |
| Base 6 | 2441046 | 2441216 |
| Base 7 | 1200437 | 1200557 |
| Base 8 | 522108 | 522218 |
| Base 9 | 326149 | 326249 |
| Base 10 | 2164010 | 2164910 |
| Base 11 | 1529311 | 152a111 |
| Base 12 | 1063412 | 1064112 |
| Base 13 | 9b0813 | 9b1413 |
| Base 14 | 7c5a14 | 7c6514 |
| Base 15 | 662a15 | 663415 |
| Base 16 | 548816 | 549116 |