Compare 1 vs 18
| Property | 1 | 18 |
|---|---|---|
| Type | composite number | composite number |
| Unique factors | 0 | 2 |
| Total factors | 0 | 3 |
| Prime factorization | 21 × 32 | |
| Prime factorization | 2 × 3 × 3 | |
| Divisors count | 1 | 6 |
| Divisors | 1 | 1, 2, 3, 6, 9, 18 |
| Number of properties | 0 | 0 |
| Roman numberals | I | XVIII |
| Base 2 | 12 | 100102 |
| Base 3 | 13 | 2003 |
| Base 4 | 14 | 1024 |
| Base 5 | 15 | 335 |
| Base 6 | 16 | 306 |
| Base 7 | 17 | 247 |
| Base 8 | 18 | 228 |
| Base 9 | 19 | 209 |
| Base 10 | 110 | 1810 |
| Base 11 | 111 | 1711 |
| Base 12 | 112 | 1612 |
| Base 13 | 113 | 1513 |
| Base 14 | 114 | 1414 |
| Base 15 | 115 | 1315 |
| Base 16 | 116 | 1216 |