Compare 247 vs 291
| Property | 247 | 291 |
|---|---|---|
| Type | semiprime | semiprime |
| Unique factors | 2 | 2 |
| Total factors | 2 | 2 |
| Prime factorization | 131 × 191 | 31 × 971 |
| Prime factorization | 13 × 19 | 3 × 97 |
| Divisors count | 4 | 4 |
| Divisors | 1, 13, 19, 247 | 1, 3, 97, 291 |
| Number of properties | 1 | 1 |
| Semiprimes | 79th | 91st |
| Roman numberals | CCXLVII | CCXCI |
| Base 2 | 111101112 | 1001000112 |
| Base 3 | 1000113 | 1012103 |
| Base 4 | 33134 | 102034 |
| Base 5 | 14425 | 21315 |
| Base 6 | 10516 | 12036 |
| Base 7 | 5027 | 5647 |
| Base 8 | 3678 | 4438 |
| Base 9 | 3049 | 3539 |
| Base 10 | 24710 | 29110 |
| Base 11 | 20511 | 24511 |
| Base 12 | 18712 | 20312 |
| Base 13 | 16013 | 19513 |
| Base 14 | 13914 | 16b14 |
| Base 15 | 11715 | 14615 |
| Base 16 | f716 | 12316 |