Compare 21 vs 34
| Property | 21 | 34 |
|---|---|---|
| Type | semiprime | semiprime |
| Unique factors | 2 | 2 |
| Total factors | 2 | 2 |
| Prime factorization | 31 × 71 | 21 × 171 |
| Prime factorization | 3 × 7 | 2 × 17 |
| Divisors count | 4 | 4 |
| Divisors | 1, 3, 7, 21 | 1, 2, 17, 34 |
| Number of properties | 1 | 1 |
| Semiprimes | 7th | 12th |
| Roman numberals | XXI | XXXIV |
| Base 2 | 101012 | 1000102 |
| Base 3 | 2103 | 10213 |
| Base 4 | 1114 | 2024 |
| Base 5 | 415 | 1145 |
| Base 6 | 336 | 546 |
| Base 7 | 307 | 467 |
| Base 8 | 258 | 428 |
| Base 9 | 239 | 379 |
| Base 10 | 2110 | 3410 |
| Base 11 | 1a11 | 3111 |
| Base 12 | 1912 | 2a12 |
| Base 13 | 1813 | 2813 |
| Base 14 | 1714 | 2614 |
| Base 15 | 1615 | 2415 |
| Base 16 | 1516 | 2216 |