Compare 30 vs 51
| Property | 30 | 51 |
|---|---|---|
| Type | composite number | semiprime |
| Unique factors | 3 | 2 |
| Total factors | 3 | 2 |
| Prime factorization | 21 × 31 × 51 | 31 × 171 |
| Prime factorization | 2 × 3 × 5 | 3 × 17 |
| Divisors count | 8 | 4 |
| Divisors | 1, 2, 3, 5, 6, 10, 15, 30 | 1, 3, 17, 51 |
| Number of properties | 0 | 1 |
| Semiprimes | 18th | |
| Roman numberals | XXX | LI |
| Base 2 | 111102 | 1100112 |
| Base 3 | 10103 | 12203 |
| Base 4 | 1324 | 3034 |
| Base 5 | 1105 | 2015 |
| Base 6 | 506 | 1236 |
| Base 7 | 427 | 1027 |
| Base 8 | 368 | 638 |
| Base 9 | 339 | 569 |
| Base 10 | 3010 | 5110 |
| Base 11 | 2811 | 4711 |
| Base 12 | 2612 | 4312 |
| Base 13 | 2413 | 3c13 |
| Base 14 | 2214 | 3914 |
| Base 15 | 2015 | 3615 |
| Base 16 | 1e16 | 3316 |