Compare 21380 vs 21391
| Property | 21380 | 21391 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 3 | 1 |
| Total factors | 4 | 1 |
| Prime factorization | 22 × 51 × 10691 | 213911 |
| Prime factorization | 2 × 2 × 5 × 1069 | 21391 |
| Divisors count | 12 | 2 |
| Divisors | 1, 2, 4, 5, 10, 20, 1069, 2138, 4276, 5345, 10690, 21380 | 1, 21391 |
| Number of properties | 0 | 3 |
| Isolated primes | 1676th | |
| Primes | 2401st | |
| Sexy primes (1st member) | 729th | |
| Roman numberals | ||
| Base 2 | 1010011100001002 | 1010011100011112 |
| Base 3 | 10020222123 | 10021000213 |
| Base 4 | 110320104 | 110320334 |
| Base 5 | 11410105 | 11410315 |
| Base 6 | 2425526 | 2430116 |
| Base 7 | 1162227 | 1162367 |
| Base 8 | 516048 | 516178 |
| Base 9 | 322859 | 323079 |
| Base 10 | 2138010 | 2139110 |
| Base 11 | 1507711 | 1508711 |
| Base 12 | 1045812 | 1046712 |
| Base 13 | 996813 | 997613 |
| Base 14 | 7b1214 | 7b1d14 |
| Base 15 | 650515 | 651115 |
| Base 16 | 538416 | 538f16 |