Compare 21 vs 58
| Property | 21 | 58 |
|---|---|---|
| Type | semiprime | semiprime |
| Unique factors | 2 | 2 |
| Total factors | 2 | 2 |
| Prime factorization | 31 × 71 | 21 × 291 |
| Prime factorization | 3 × 7 | 2 × 29 |
| Divisors count | 4 | 4 |
| Divisors | 1, 3, 7, 21 | 1, 2, 29, 58 |
| Number of properties | 1 | 1 |
| Semiprimes | 7th | 21st |
| Roman numberals | XXI | LVIII |
| Base 2 | 101012 | 1110102 |
| Base 3 | 2103 | 20113 |
| Base 4 | 1114 | 3224 |
| Base 5 | 415 | 2135 |
| Base 6 | 336 | 1346 |
| Base 7 | 307 | 1127 |
| Base 8 | 258 | 728 |
| Base 9 | 239 | 649 |
| Base 10 | 2110 | 5810 |
| Base 11 | 1a11 | 5311 |
| Base 12 | 1912 | 4a12 |
| Base 13 | 1813 | 4613 |
| Base 14 | 1714 | 4214 |
| Base 15 | 1615 | 3d15 |
| Base 16 | 1516 | 3a16 |