Compare 161 vs 172
| Property | 161 | 172 |
|---|---|---|
| Type | semiprime | composite number |
| Unique factors | 2 | 2 |
| Total factors | 2 | 3 |
| Prime factorization | 71 × 231 | 22 × 431 |
| Prime factorization | 7 × 23 | 2 × 2 × 43 |
| Divisors count | 4 | 6 |
| Divisors | 1, 7, 23, 161 | 1, 2, 4, 43, 86, 172 |
| Number of properties | 1 | 0 |
| Semiprimes | 54th | |
| Roman numberals | CLXI | CLXXII |
| Base 2 | 101000012 | 101011002 |
| Base 3 | 122223 | 201013 |
| Base 4 | 22014 | 22304 |
| Base 5 | 11215 | 11425 |
| Base 6 | 4256 | 4446 |
| Base 7 | 3207 | 3347 |
| Base 8 | 2418 | 2548 |
| Base 9 | 1889 | 2119 |
| Base 10 | 16110 | 17210 |
| Base 11 | 13711 | 14711 |
| Base 12 | 11512 | 12412 |
| Base 13 | c513 | 10313 |
| Base 14 | b714 | c414 |
| Base 15 | ab15 | b715 |
| Base 16 | a116 | ac16 |