Compare 21 vs 24
| Property | 21 | 24 |
|---|---|---|
| Type | semiprime | composite number |
| Unique factors | 2 | 2 |
| Total factors | 2 | 4 |
| Prime factorization | 31 × 71 | 23 × 31 |
| Prime factorization | 3 × 7 | 2 × 2 × 2 × 3 |
| Divisors count | 4 | 8 |
| Divisors | 1, 3, 7, 21 | 1, 2, 3, 4, 6, 8, 12, 24 |
| Number of properties | 1 | 0 |
| Semiprimes | 7th | |
| Roman numberals | XXI | XXIV |
| Base 2 | 101012 | 110002 |
| Base 3 | 2103 | 2203 |
| Base 4 | 1114 | 1204 |
| Base 5 | 415 | 445 |
| Base 6 | 336 | 406 |
| Base 7 | 307 | 337 |
| Base 8 | 258 | 308 |
| Base 9 | 239 | 269 |
| Base 10 | 2110 | 2410 |
| Base 11 | 1a11 | 2211 |
| Base 12 | 1912 | 2012 |
| Base 13 | 1813 | 1b13 |
| Base 14 | 1714 | 1a14 |
| Base 15 | 1615 | 1915 |
| Base 16 | 1516 | 1816 |