Compare 138 vs 145
| Property | 138 | 145 |
|---|---|---|
| Type | composite number | semiprime |
| Unique factors | 3 | 2 |
| Total factors | 3 | 2 |
| Prime factorization | 21 × 31 × 231 | 51 × 291 |
| Prime factorization | 2 × 3 × 23 | 5 × 29 |
| Divisors count | 8 | 4 |
| Divisors | 1, 2, 3, 6, 23, 46, 69, 138 | 1, 5, 29, 145 |
| Number of properties | 0 | 1 |
| Semiprimes | 49th | |
| Roman numberals | CXXXVIII | CXLV |
| Base 2 | 100010102 | 100100012 |
| Base 3 | 120103 | 121013 |
| Base 4 | 20224 | 21014 |
| Base 5 | 10235 | 10405 |
| Base 6 | 3506 | 4016 |
| Base 7 | 2557 | 2657 |
| Base 8 | 2128 | 2218 |
| Base 9 | 1639 | 1719 |
| Base 10 | 13810 | 14510 |
| Base 11 | 11611 | 12211 |
| Base 12 | b612 | 10112 |
| Base 13 | a813 | b213 |
| Base 14 | 9c14 | a514 |
| Base 15 | 9315 | 9a15 |
| Base 16 | 8a16 | 9116 |