Compare 21391 vs 21400
| Property | 21391 | 21400 |
|---|---|---|
| Type | prime | composite number |
| Unique factors | 1 | 3 |
| Total factors | 1 | 6 |
| Prime factorization | 213911 | 23 × 52 × 1071 |
| Prime factorization | 21391 | 2 × 2 × 2 × 5 × 5 × 107 |
| Divisors count | 2 | 24 |
| Divisors | 1, 21391 | 1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 107, 200, 214, 428, 535, 856, 1070, 2140, 2675, 4280, 5350, 10700, 21400 |
| Number of properties | 3 | 0 |
| Isolated primes | 1676th | |
| Primes | 2401st | |
| Sexy primes (1st member) | 729th | |
| Roman numberals | ||
| Base 2 | 1010011100011112 | 1010011100110002 |
| Base 3 | 10021000213 | 10021001213 |
| Base 4 | 110320334 | 110321204 |
| Base 5 | 11410315 | 11411005 |
| Base 6 | 2430116 | 2430246 |
| Base 7 | 1162367 | 1162517 |
| Base 8 | 516178 | 516308 |
| Base 9 | 323079 | 323179 |
| Base 10 | 2139110 | 2140010 |
| Base 11 | 1508711 | 1509511 |
| Base 12 | 1046712 | 1047412 |
| Base 13 | 997613 | 998213 |
| Base 14 | 7b1d14 | 7b2814 |
| Base 15 | 651115 | 651a15 |
| Base 16 | 538f16 | 539816 |