Compare 21391 vs 21393
| Property | 21391 | 21393 |
|---|---|---|
| Type | prime | composite number |
| Unique factors | 1 | 2 |
| Total factors | 1 | 3 |
| Prime factorization | 213911 | 32 × 23771 |
| Prime factorization | 21391 | 3 × 3 × 2377 |
| Divisors count | 2 | 6 |
| Divisors | 1, 21391 | 1, 3, 9, 2377, 7131, 21393 |
| Number of properties | 3 | 0 |
| Isolated primes | 1676th | |
| Primes | 2401st | |
| Sexy primes (1st member) | 729th | |
| Roman numberals | ||
| Base 2 | 1010011100011112 | 1010011100100012 |
| Base 3 | 10021000213 | 10021001003 |
| Base 4 | 110320334 | 110321014 |
| Base 5 | 11410315 | 11410335 |
| Base 6 | 2430116 | 2430136 |
| Base 7 | 1162367 | 1162417 |
| Base 8 | 516178 | 516218 |
| Base 9 | 323079 | 323109 |
| Base 10 | 2139110 | 2139310 |
| Base 11 | 1508711 | 1508911 |
| Base 12 | 1046712 | 1046912 |
| Base 13 | 997613 | 997813 |
| Base 14 | 7b1d14 | 7b2114 |
| Base 15 | 651115 | 651315 |
| Base 16 | 538f16 | 539116 |