Compare 18 vs 26
| Property | 18 | 26 |
|---|---|---|
| Type | composite number | semiprime |
| Unique factors | 2 | 2 |
| Total factors | 3 | 2 |
| Prime factorization | 21 × 32 | 21 × 131 |
| Prime factorization | 2 × 3 × 3 | 2 × 13 |
| Divisors count | 6 | 4 |
| Divisors | 1, 2, 3, 6, 9, 18 | 1, 2, 13, 26 |
| Number of properties | 0 | 1 |
| Semiprimes | 10th | |
| Roman numberals | XVIII | XXVI |
| Base 2 | 100102 | 110102 |
| Base 3 | 2003 | 2223 |
| Base 4 | 1024 | 1224 |
| Base 5 | 335 | 1015 |
| Base 6 | 306 | 426 |
| Base 7 | 247 | 357 |
| Base 8 | 228 | 328 |
| Base 9 | 209 | 289 |
| Base 10 | 1810 | 2610 |
| Base 11 | 1711 | 2411 |
| Base 12 | 1612 | 2212 |
| Base 13 | 1513 | 2013 |
| Base 14 | 1414 | 1c14 |
| Base 15 | 1315 | 1b15 |
| Base 16 | 1216 | 1a16 |