Compare 1915 vs 1920
| Property | 1915 | 1920 |
|---|---|---|
| Type | semiprime | composite number |
| Unique factors | 2 | 3 |
| Total factors | 2 | 9 |
| Prime factorization | 51 × 3831 | 27 × 31 × 51 |
| Prime factorization | 5 × 383 | 2 × 2 × 2 × 2 × 2 × 2 × 2 × 3 × 5 |
| Divisors count | 4 | 32 |
| Divisors | 1, 5, 383, 1915 | 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 32, 40, 48, 60, 64, 80, 96, 120, 128, 160, 192, 240, 320, 384, 480, 640, 960, 1920 |
| Number of properties | 1 | 0 |
| Semiprimes | 550th | |
| Roman numberals | MCMXV | MCMXX |
| Base 2 | 111011110112 | 111100000002 |
| Base 3 | 21212213 | 21220103 |
| Base 4 | 1313234 | 1320004 |
| Base 5 | 301305 | 301405 |
| Base 6 | 125116 | 125206 |
| Base 7 | 54047 | 54127 |
| Base 8 | 35738 | 36008 |
| Base 9 | 25579 | 25639 |
| Base 10 | 191510 | 192010 |
| Base 11 | 149111 | 149611 |
| Base 12 | 113712 | 114012 |
| Base 13 | b4413 | b4913 |
| Base 14 | 9ab14 | 9b214 |
| Base 15 | 87a15 | 88015 |
| Base 16 | 77b16 | 78016 |