Compare 4 vs 51
| Property | 4 | 51 |
|---|---|---|
| Type | semiprime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 2 | 2 |
| Prime factorization | 22 | 31 × 171 |
| Prime factorization | 2 × 2 | 3 × 17 |
| Divisors count | 3 | 4 |
| Divisors | 1, 2, 4 | 1, 3, 17, 51 |
| Number of properties | 1 | 1 |
| Semiprimes | 1st | 18th |
| Roman numberals | IV | LI |
| Base 2 | 1002 | 1100112 |
| Base 3 | 113 | 12203 |
| Base 4 | 104 | 3034 |
| Base 5 | 45 | 2015 |
| Base 6 | 46 | 1236 |
| Base 7 | 47 | 1027 |
| Base 8 | 48 | 638 |
| Base 9 | 49 | 569 |
| Base 10 | 410 | 5110 |
| Base 11 | 411 | 4711 |
| Base 12 | 412 | 4312 |
| Base 13 | 413 | 3c13 |
| Base 14 | 414 | 3914 |
| Base 15 | 415 | 3615 |
| Base 16 | 416 | 3316 |