Compare 640 vs 642
| Property | 640 | 642 |
|---|---|---|
| Type | composite number | composite number |
| Unique factors | 2 | 3 |
| Total factors | 8 | 3 |
| Prime factorization | 27 × 51 | 21 × 31 × 1071 |
| Prime factorization | 2 × 2 × 2 × 2 × 2 × 2 × 2 × 5 | 2 × 3 × 107 |
| Divisors count | 16 | 8 |
| Divisors | 1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640 | 1, 2, 3, 6, 107, 214, 321, 642 |
| Number of properties | 0 | 0 |
| Roman numberals | DCXL | DCXLII |
| Base 2 | 10100000002 | 10100000102 |
| Base 3 | 2122013 | 2122103 |
| Base 4 | 220004 | 220024 |
| Base 5 | 100305 | 100325 |
| Base 6 | 25446 | 25506 |
| Base 7 | 16037 | 16057 |
| Base 8 | 12008 | 12028 |
| Base 9 | 7819 | 7839 |
| Base 10 | 64010 | 64210 |
| Base 11 | 53211 | 53411 |
| Base 12 | 45412 | 45612 |
| Base 13 | 3a313 | 3a513 |
| Base 14 | 33a14 | 33c14 |
| Base 15 | 2ca15 | 2cc15 |
| Base 16 | 28016 | 28216 |