Compare 21381 vs 21390
| Property | 21381 | 21390 |
|---|---|---|
| Type | semiprime | composite number |
| Unique factors | 2 | 5 |
| Total factors | 2 | 5 |
| Prime factorization | 31 × 71271 | 21 × 31 × 51 × 231 × 311 |
| Prime factorization | 3 × 7127 | 2 × 3 × 5 × 23 × 31 |
| Divisors count | 4 | 32 |
| Divisors | 1, 3, 7127, 21381 | 1, 2, 3, 5, 6, 10, 15, 23, 30, 31, 46, 62, 69, 93, 115, 138, 155, 186, 230, 310, 345, 465, 690, 713, 930, 1426, 2139, 3565, 4278, 7130, 10695, 21390 |
| Number of properties | 1 | 0 |
| Semiprimes | 5417th | |
| Roman numberals | ||
| Base 2 | 1010011100001012 | 1010011100011102 |
| Base 3 | 10020222203 | 10021000203 |
| Base 4 | 110320114 | 110320324 |
| Base 5 | 11410115 | 11410305 |
| Base 6 | 2425536 | 2430106 |
| Base 7 | 1162237 | 1162357 |
| Base 8 | 516058 | 516168 |
| Base 9 | 322869 | 323069 |
| Base 10 | 2138110 | 2139010 |
| Base 11 | 1507811 | 1508611 |
| Base 12 | 1045912 | 1046612 |
| Base 13 | 996913 | 997513 |
| Base 14 | 7b1314 | 7b1c14 |
| Base 15 | 650615 | 651015 |
| Base 16 | 538516 | 538e16 |