Compare 280 vs 291
| Property | 280 | 291 |
|---|---|---|
| Type | composite number | semiprime |
| Unique factors | 3 | 2 |
| Total factors | 5 | 2 |
| Prime factorization | 23 × 51 × 71 | 31 × 971 |
| Prime factorization | 2 × 2 × 2 × 5 × 7 | 3 × 97 |
| Divisors count | 16 | 4 |
| Divisors | 1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280 | 1, 3, 97, 291 |
| Number of properties | 0 | 1 |
| Semiprimes | 91st | |
| Roman numberals | CCLXXX | CCXCI |
| Base 2 | 1000110002 | 1001000112 |
| Base 3 | 1011013 | 1012103 |
| Base 4 | 101204 | 102034 |
| Base 5 | 21105 | 21315 |
| Base 6 | 11446 | 12036 |
| Base 7 | 5507 | 5647 |
| Base 8 | 4308 | 4438 |
| Base 9 | 3419 | 3539 |
| Base 10 | 28010 | 29110 |
| Base 11 | 23511 | 24511 |
| Base 12 | 1b412 | 20312 |
| Base 13 | 18713 | 19513 |
| Base 14 | 16014 | 16b14 |
| Base 15 | 13a15 | 14615 |
| Base 16 | 11816 | 12316 |