Compare 388 vs 391
| Property | 388 | 391 |
|---|---|---|
| Type | composite number | semiprime |
| Unique factors | 2 | 2 |
| Total factors | 3 | 2 |
| Prime factorization | 22 × 971 | 171 × 231 |
| Prime factorization | 2 × 2 × 97 | 17 × 23 |
| Divisors count | 6 | 4 |
| Divisors | 1, 2, 4, 97, 194, 388 | 1, 17, 23, 391 |
| Number of properties | 0 | 1 |
| Semiprimes | 122nd | |
| Roman numberals | CCCLXXXVIII | CCCXCI |
| Base 2 | 1100001002 | 1100001112 |
| Base 3 | 1121013 | 1121113 |
| Base 4 | 120104 | 120134 |
| Base 5 | 30235 | 30315 |
| Base 6 | 14446 | 14516 |
| Base 7 | 10637 | 10667 |
| Base 8 | 6048 | 6078 |
| Base 9 | 4719 | 4749 |
| Base 10 | 38810 | 39110 |
| Base 11 | 32311 | 32611 |
| Base 12 | 28412 | 28712 |
| Base 13 | 23b13 | 24113 |
| Base 14 | 1da14 | 1dd14 |
| Base 15 | 1ad15 | 1b115 |
| Base 16 | 18416 | 18716 |
