Compare 21809 vs 21820
| Property | 21809 | 21820 |
|---|---|---|
| Type | semiprime | composite number |
| Unique factors | 2 | 3 |
| Total factors | 2 | 4 |
| Prime factorization | 1131 × 1931 | 22 × 51 × 10911 |
| Prime factorization | 113 × 193 | 2 × 2 × 5 × 1091 |
| Divisors count | 4 | 12 |
| Divisors | 1, 113, 193, 21809 | 1, 2, 4, 5, 10, 20, 1091, 2182, 4364, 5455, 10910, 21820 |
| Number of properties | 1 | 0 |
| Semiprimes | 5510th | |
| Roman numberals | ||
| Base 2 | 1010101001100012 | 1010101001111002 |
| Base 3 | 10022202023 | 10022210113 |
| Base 4 | 111103014 | 111103304 |
| Base 5 | 11442145 | 11442405 |
| Base 6 | 2445456 | 2450046 |
| Base 7 | 1204047 | 1204217 |
| Base 8 | 524618 | 524748 |
| Base 9 | 328229 | 328349 |
| Base 10 | 2180910 | 2182010 |
| Base 11 | 1542711 | 1543711 |
| Base 12 | 1075512 | 1076412 |
| Base 13 | 9c0813 | 9c1613 |
| Base 14 | 7d3b14 | 7d4814 |
| Base 15 | 66de15 | 66ea15 |
| Base 16 | 553116 | 553c16 |