Compare 21391 vs 21399
| Property | 21391 | 21399 |
|---|---|---|
| Type | prime | composite number |
| Unique factors | 1 | 3 |
| Total factors | 1 | 3 |
| Prime factorization | 213911 | 31 × 71 × 10191 |
| Prime factorization | 21391 | 3 × 7 × 1019 |
| Divisors count | 2 | 8 |
| Divisors | 1, 21391 | 1, 3, 7, 21, 1019, 3057, 7133, 21399 |
| Number of properties | 3 | 0 |
| Isolated primes | 1676th | |
| Primes | 2401st | |
| Sexy primes (1st member) | 729th | |
| Roman numberals | ||
| Base 2 | 1010011100011112 | 1010011100101112 |
| Base 3 | 10021000213 | 10021001203 |
| Base 4 | 110320334 | 110321134 |
| Base 5 | 11410315 | 11410445 |
| Base 6 | 2430116 | 2430236 |
| Base 7 | 1162367 | 1162507 |
| Base 8 | 516178 | 516278 |
| Base 9 | 323079 | 323169 |
| Base 10 | 2139110 | 2139910 |
| Base 11 | 1508711 | 1509411 |
| Base 12 | 1046712 | 1047312 |
| Base 13 | 997613 | 998113 |
| Base 14 | 7b1d14 | 7b2714 |
| Base 15 | 651115 | 651915 |
| Base 16 | 538f16 | 539716 |