Compare 155 vs 161
| Property | 155 | 161 |
|---|---|---|
| Type | semiprime | semiprime |
| Unique factors | 2 | 2 |
| Total factors | 2 | 2 |
| Prime factorization | 51 × 311 | 71 × 231 |
| Prime factorization | 5 × 31 | 7 × 23 |
| Divisors count | 4 | 4 |
| Divisors | 1, 5, 31, 155 | 1, 7, 23, 161 |
| Number of properties | 1 | 1 |
| Semiprimes | 51st | 54th |
| Roman numberals | CLV | CLXI |
| Base 2 | 100110112 | 101000012 |
| Base 3 | 122023 | 122223 |
| Base 4 | 21234 | 22014 |
| Base 5 | 11105 | 11215 |
| Base 6 | 4156 | 4256 |
| Base 7 | 3117 | 3207 |
| Base 8 | 2338 | 2418 |
| Base 9 | 1829 | 1889 |
| Base 10 | 15510 | 16110 |
| Base 11 | 13111 | 13711 |
| Base 12 | 10b12 | 11512 |
| Base 13 | bc13 | c513 |
| Base 14 | b114 | b714 |
| Base 15 | a515 | ab15 |
| Base 16 | 9b16 | a116 |