Compare 40 vs 49
| Property | 40 | 49 |
|---|---|---|
| Type | composite number | semiprime |
| Unique factors | 2 | 1 |
| Total factors | 4 | 2 |
| Prime factorization | 23 × 51 | 72 |
| Prime factorization | 2 × 2 × 2 × 5 | 7 × 7 |
| Divisors count | 8 | 3 |
| Divisors | 1, 2, 4, 5, 8, 10, 20, 40 | 1, 7, 49 |
| Number of properties | 0 | 1 |
| Semiprimes | 17th | |
| Roman numberals | XL | XLIX |
| Base 2 | 1010002 | 1100012 |
| Base 3 | 11113 | 12113 |
| Base 4 | 2204 | 3014 |
| Base 5 | 1305 | 1445 |
| Base 6 | 1046 | 1216 |
| Base 7 | 557 | 1007 |
| Base 8 | 508 | 618 |
| Base 9 | 449 | 549 |
| Base 10 | 4010 | 4910 |
| Base 11 | 3711 | 4511 |
| Base 12 | 3412 | 4112 |
| Base 13 | 3113 | 3a13 |
| Base 14 | 2c14 | 3714 |
| Base 15 | 2a15 | 3415 |
| Base 16 | 2816 | 3116 |