Compare 640 vs 646
| Property | 640 | 646 |
|---|---|---|
| Type | composite number | composite number |
| Unique factors | 2 | 3 |
| Total factors | 8 | 3 |
| Prime factorization | 27 × 51 | 21 × 171 × 191 |
| Prime factorization | 2 × 2 × 2 × 2 × 2 × 2 × 2 × 5 | 2 × 17 × 19 |
| Divisors count | 16 | 8 |
| Divisors | 1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640 | 1, 2, 17, 19, 34, 38, 323, 646 |
| Number of properties | 0 | 0 |
| Roman numberals | DCXL | DCXLVI |
| Base 2 | 10100000002 | 10100001102 |
| Base 3 | 2122013 | 2122213 |
| Base 4 | 220004 | 220124 |
| Base 5 | 100305 | 100415 |
| Base 6 | 25446 | 25546 |
| Base 7 | 16037 | 16127 |
| Base 8 | 12008 | 12068 |
| Base 9 | 7819 | 7879 |
| Base 10 | 64010 | 64610 |
| Base 11 | 53211 | 53811 |
| Base 12 | 45412 | 45a12 |
| Base 13 | 3a313 | 3a913 |
| Base 14 | 33a14 | 34214 |
| Base 15 | 2ca15 | 2d115 |
| Base 16 | 28016 | 28616 |