Compare 80 vs 81
| Property | 80 | 81 |
|---|---|---|
| Type | composite number | composite number |
| Unique factors | 2 | 1 |
| Total factors | 5 | 4 |
| Prime factorization | 24 × 51 | 34 |
| Prime factorization | 2 × 2 × 2 × 2 × 5 | 3 × 3 × 3 × 3 |
| Divisors count | 10 | 5 |
| Divisors | 1, 2, 4, 5, 8, 10, 16, 20, 40, 80 | 1, 3, 9, 27, 81 |
| Number of properties | 0 | 0 |
| Roman numberals | LXXX | LXXXI |
| Base 2 | 10100002 | 10100012 |
| Base 3 | 22223 | 100003 |
| Base 4 | 11004 | 11014 |
| Base 5 | 3105 | 3115 |
| Base 6 | 2126 | 2136 |
| Base 7 | 1437 | 1447 |
| Base 8 | 1208 | 1218 |
| Base 9 | 889 | 1009 |
| Base 10 | 8010 | 8110 |
| Base 11 | 7311 | 7411 |
| Base 12 | 6812 | 6912 |
| Base 13 | 6213 | 6313 |
| Base 14 | 5a14 | 5b14 |
| Base 15 | 5515 | 5615 |
| Base 16 | 5016 | 5116 |