Compare 20808 vs 20809
| Property | 20808 | 20809 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 3 | 1 |
| Total factors | 7 | 1 |
| Prime factorization | 23 × 32 × 172 | 208091 |
| Prime factorization | 2 × 2 × 2 × 3 × 3 × 17 × 17 | 20809 |
| Divisors count | 36 | 2 |
| Divisors | 1, 2, 3, 4, 6, 8, 9, 12, 17, 18, 24, 34, 36, 51, 68, 72, 102, 136, 153, 204, 289, 306, 408, 578, 612, 867, 1156, 1224, 1734, 2312, 2601, 3468, 5202, 6936, 10404, 20808 | 1, 20809 |
| Number of properties | 0 | 5 |
| Additive primes | 1091st | |
| Harmonic primes | 859th | |
| Primes | 2344th | |
| Pythagorean primes | 1165th | |
| Twin primes (2nd member) | 355th | |
| Roman numberals | ||
| Base 2 | 1010001010010002 | 1010001010010012 |
| Base 3 | 10011122003 | 10011122013 |
| Base 4 | 110110204 | 110110214 |
| Base 5 | 11312135 | 11312145 |
| Base 6 | 2402006 | 2402016 |
| Base 7 | 1144447 | 1144457 |
| Base 8 | 505108 | 505118 |
| Base 9 | 314809 | 314819 |
| Base 10 | 2080810 | 2080910 |
| Base 11 | 146a711 | 146a811 |
| Base 12 | 1006012 | 1006112 |
| Base 13 | 961813 | 961913 |
| Base 14 | 782414 | 782514 |
| Base 15 | 627315 | 627415 |
| Base 16 | 514816 | 514916 |