Compare 123 vs 128
| Property | 123 | 128 |
|---|---|---|
| Type | semiprime | composite number |
| Unique factors | 2 | 1 |
| Total factors | 2 | 7 |
| Prime factorization | 31 × 411 | 27 |
| Prime factorization | 3 × 41 | 2 × 2 × 2 × 2 × 2 × 2 × 2 |
| Divisors count | 4 | 8 |
| Divisors | 1, 3, 41, 123 | 1, 2, 4, 8, 16, 32, 64, 128 |
| Number of properties | 1 | 0 |
| Semiprimes | 42nd | |
| Roman numberals | CXXIII | CXXVIII |
| Base 2 | 11110112 | 100000002 |
| Base 3 | 111203 | 112023 |
| Base 4 | 13234 | 20004 |
| Base 5 | 4435 | 10035 |
| Base 6 | 3236 | 3326 |
| Base 7 | 2347 | 2427 |
| Base 8 | 1738 | 2008 |
| Base 9 | 1469 | 1529 |
| Base 10 | 12310 | 12810 |
| Base 11 | 10211 | 10711 |
| Base 12 | a312 | a812 |
| Base 13 | 9613 | 9b13 |
| Base 14 | 8b14 | 9214 |
| Base 15 | 8315 | 8815 |
| Base 16 | 7b16 | 8016 |