Compare 28 vs 40
| Property | 28 | 40 |
|---|---|---|
| Type | composite number | composite number |
| Unique factors | 2 | 2 |
| Total factors | 3 | 4 |
| Prime factorization | 22 × 71 | 23 × 51 |
| Prime factorization | 2 × 2 × 7 | 2 × 2 × 2 × 5 |
| Divisors count | 6 | 8 |
| Divisors | 1, 2, 4, 7, 14, 28 | 1, 2, 4, 5, 8, 10, 20, 40 |
| Number of properties | 0 | 0 |
| Roman numberals | XXVIII | XL |
| Base 2 | 111002 | 1010002 |
| Base 3 | 10013 | 11113 |
| Base 4 | 1304 | 2204 |
| Base 5 | 1035 | 1305 |
| Base 6 | 446 | 1046 |
| Base 7 | 407 | 557 |
| Base 8 | 348 | 508 |
| Base 9 | 319 | 449 |
| Base 10 | 2810 | 4010 |
| Base 11 | 2611 | 3711 |
| Base 12 | 2412 | 3412 |
| Base 13 | 2213 | 3113 |
| Base 14 | 2014 | 2c14 |
| Base 15 | 1d15 | 2a15 |
| Base 16 | 1c16 | 2816 |