Compare 1990 vs 2001
| Property | 1990 | 2001 |
|---|---|---|
| Type | composite number | composite number |
| Unique factors | 3 | 3 |
| Total factors | 3 | 3 |
| Prime factorization | 21 × 51 × 1991 | 31 × 231 × 291 |
| Prime factorization | 2 × 5 × 199 | 3 × 23 × 29 |
| Divisors count | 8 | 8 |
| Divisors | 1, 2, 5, 10, 199, 398, 995, 1990 | 1, 3, 23, 29, 69, 87, 667, 2001 |
| Number of properties | 0 | 0 |
| Roman numberals | MCMXC | MMI |
| Base 2 | 111110001102 | 111110100012 |
| Base 3 | 22012013 | 22020103 |
| Base 4 | 1330124 | 1331014 |
| Base 5 | 304305 | 310015 |
| Base 6 | 131146 | 131336 |
| Base 7 | 55427 | 55567 |
| Base 8 | 37068 | 37218 |
| Base 9 | 26519 | 26639 |
| Base 10 | 199010 | 200110 |
| Base 11 | 154a11 | 155a11 |
| Base 12 | 119a12 | 11a912 |
| Base 13 | ba113 | bac13 |
| Base 14 | a2214 | a2d14 |
| Base 15 | 8ca15 | 8d615 |
| Base 16 | 7c616 | 7d116 |