Compare 80 vs 85
| Property | 80 | 85 |
|---|---|---|
| Type | composite number | semiprime |
| Unique factors | 2 | 2 |
| Total factors | 5 | 2 |
| Prime factorization | 24 × 51 | 51 × 171 |
| Prime factorization | 2 × 2 × 2 × 2 × 5 | 5 × 17 |
| Divisors count | 10 | 4 |
| Divisors | 1, 2, 4, 5, 8, 10, 16, 20, 40, 80 | 1, 5, 17, 85 |
| Number of properties | 0 | 1 |
| Semiprimes | 28th | |
| Roman numberals | LXXX | LXXXV |
| Base 2 | 10100002 | 10101012 |
| Base 3 | 22223 | 100113 |
| Base 4 | 11004 | 11114 |
| Base 5 | 3105 | 3205 |
| Base 6 | 2126 | 2216 |
| Base 7 | 1437 | 1517 |
| Base 8 | 1208 | 1258 |
| Base 9 | 889 | 1049 |
| Base 10 | 8010 | 8510 |
| Base 11 | 7311 | 7811 |
| Base 12 | 6812 | 7112 |
| Base 13 | 6213 | 6713 |
| Base 14 | 5a14 | 6114 |
| Base 15 | 5515 | 5a15 |
| Base 16 | 5016 | 5516 |