Compare 1986 vs 1991
| Property | 1986 | 1991 |
|---|---|---|
| Type | composite number | semiprime |
| Unique factors | 3 | 2 |
| Total factors | 3 | 2 |
| Prime factorization | 21 × 31 × 3311 | 111 × 1811 |
| Prime factorization | 2 × 3 × 331 | 11 × 181 |
| Divisors count | 8 | 4 |
| Divisors | 1, 2, 3, 6, 331, 662, 993, 1986 | 1, 11, 181, 1991 |
| Number of properties | 0 | 1 |
| Semiprimes | 576th | |
| Roman numberals | MCMLXXXVI | MCMXCI |
| Base 2 | 111110000102 | 111110001112 |
| Base 3 | 22011203 | 22012023 |
| Base 4 | 1330024 | 1330134 |
| Base 5 | 304215 | 304315 |
| Base 6 | 131106 | 131156 |
| Base 7 | 55357 | 55437 |
| Base 8 | 37028 | 37078 |
| Base 9 | 26469 | 26529 |
| Base 10 | 198610 | 199110 |
| Base 11 | 154611 | 155011 |
| Base 12 | 119612 | 119b12 |
| Base 13 | b9a13 | ba213 |
| Base 14 | a1c14 | a2314 |
| Base 15 | 8c615 | 8cb15 |
| Base 16 | 7c216 | 7c716 |