Compare 355 vs 391
| Property | 355 | 391 |
|---|---|---|
| Type | semiprime | semiprime |
| Unique factors | 2 | 2 |
| Total factors | 2 | 2 |
| Prime factorization | 51 × 711 | 171 × 231 |
| Prime factorization | 5 × 71 | 17 × 23 |
| Divisors count | 4 | 4 |
| Divisors | 1, 5, 71, 355 | 1, 17, 23, 391 |
| Number of properties | 1 | 1 |
| Semiprimes | 112th | 122nd |
| Roman numberals | CCCLV | CCCXCI |
| Base 2 | 1011000112 | 1100001112 |
| Base 3 | 1110113 | 1121113 |
| Base 4 | 112034 | 120134 |
| Base 5 | 24105 | 30315 |
| Base 6 | 13516 | 14516 |
| Base 7 | 10157 | 10667 |
| Base 8 | 5438 | 6078 |
| Base 9 | 4349 | 4749 |
| Base 10 | 35510 | 39110 |
| Base 11 | 2a311 | 32611 |
| Base 12 | 25712 | 28712 |
| Base 13 | 21413 | 24113 |
| Base 14 | 1b514 | 1dd14 |
| Base 15 | 18a15 | 1b115 |
| Base 16 | 16316 | 18716 |