Compare 45 vs 55
| Property | 45 | 55 |
|---|---|---|
| Type | composite number | semiprime |
| Unique factors | 2 | 2 |
| Total factors | 3 | 2 |
| Prime factorization | 32 × 51 | 51 × 111 |
| Prime factorization | 3 × 3 × 5 | 5 × 11 |
| Divisors count | 6 | 4 |
| Divisors | 1, 3, 5, 9, 15, 45 | 1, 5, 11, 55 |
| Number of properties | 0 | 1 |
| Semiprimes | 19th | |
| Roman numberals | XLV | LV |
| Base 2 | 1011012 | 1101112 |
| Base 3 | 12003 | 20013 |
| Base 4 | 2314 | 3134 |
| Base 5 | 1405 | 2105 |
| Base 6 | 1136 | 1316 |
| Base 7 | 637 | 1067 |
| Base 8 | 558 | 678 |
| Base 9 | 509 | 619 |
| Base 10 | 4510 | 5510 |
| Base 11 | 4111 | 5011 |
| Base 12 | 3912 | 4712 |
| Base 13 | 3613 | 4313 |
| Base 14 | 3314 | 3d14 |
| Base 15 | 3015 | 3a15 |
| Base 16 | 2d16 | 3716 |