Compare 1940 vs 1945
| Property | 1940 | 1945 |
|---|---|---|
| Type | composite number | semiprime |
| Unique factors | 3 | 2 |
| Total factors | 4 | 2 |
| Prime factorization | 22 × 51 × 971 | 51 × 3891 |
| Prime factorization | 2 × 2 × 5 × 97 | 5 × 389 |
| Divisors count | 12 | 4 |
| Divisors | 1, 2, 4, 5, 10, 20, 97, 194, 388, 485, 970, 1940 | 1, 5, 389, 1945 |
| Number of properties | 0 | 1 |
| Semiprimes | 562nd | |
| Roman numberals | MCMXL | MCMXLV |
| Base 2 | 111100101002 | 111100110012 |
| Base 3 | 21222123 | 22000013 |
| Base 4 | 1321104 | 1321214 |
| Base 5 | 302305 | 302405 |
| Base 6 | 125526 | 130016 |
| Base 7 | 54417 | 54467 |
| Base 8 | 36248 | 36318 |
| Base 9 | 25859 | 26019 |
| Base 10 | 194010 | 194510 |
| Base 11 | 150411 | 150911 |
| Base 12 | 115812 | 116112 |
| Base 13 | b6313 | b6813 |
| Base 14 | 9c814 | 9cd14 |
| Base 15 | 89515 | 89a15 |
| Base 16 | 79416 | 79916 |