Compare 21 vs 54
| Property | 21 | 54 |
|---|---|---|
| Type | semiprime | composite number |
| Unique factors | 2 | 2 |
| Total factors | 2 | 4 |
| Prime factorization | 31 × 71 | 21 × 33 |
| Prime factorization | 3 × 7 | 2 × 3 × 3 × 3 |
| Divisors count | 4 | 8 |
| Divisors | 1, 3, 7, 21 | 1, 2, 3, 6, 9, 18, 27, 54 |
| Number of properties | 1 | 0 |
| Semiprimes | 7th | |
| Roman numberals | XXI | LIV |
| Base 2 | 101012 | 1101102 |
| Base 3 | 2103 | 20003 |
| Base 4 | 1114 | 3124 |
| Base 5 | 415 | 2045 |
| Base 6 | 336 | 1306 |
| Base 7 | 307 | 1057 |
| Base 8 | 258 | 668 |
| Base 9 | 239 | 609 |
| Base 10 | 2110 | 5410 |
| Base 11 | 1a11 | 4a11 |
| Base 12 | 1912 | 4612 |
| Base 13 | 1813 | 4213 |
| Base 14 | 1714 | 3c14 |
| Base 15 | 1615 | 3915 |
| Base 16 | 1516 | 3616 |