Compare 20987 vs 20990
| Property | 20987 | 20990 |
|---|---|---|
| Type | semiprime | composite number |
| Unique factors | 2 | 3 |
| Total factors | 2 | 3 |
| Prime factorization | 311 × 6771 | 21 × 51 × 20991 |
| Prime factorization | 31 × 677 | 2 × 5 × 2099 |
| Divisors count | 4 | 8 |
| Divisors | 1, 31, 677, 20987 | 1, 2, 5, 10, 2099, 4198, 10495, 20990 |
| Number of properties | 1 | 0 |
| Semiprimes | 5323rd | |
| Roman numberals | ||
| Base 2 | 1010001111110112 | 1010001111111102 |
| Base 3 | 10012100223 | 10012101023 |
| Base 4 | 110133234 | 110133324 |
| Base 5 | 11324225 | 11324305 |
| Base 6 | 2410556 | 2411026 |
| Base 7 | 1151217 | 1151247 |
| Base 8 | 507738 | 507768 |
| Base 9 | 317089 | 317129 |
| Base 10 | 2098710 | 2099010 |
| Base 11 | 1484a11 | 1485211 |
| Base 12 | 1018b12 | 1019212 |
| Base 13 | 972513 | 972813 |
| Base 14 | 791114 | 791414 |
| Base 15 | 634215 | 634515 |
| Base 16 | 51fb16 | 51fe16 |