Compare 21001 vs 21009
| Property | 21001 | 21009 |
|---|---|---|
| Type | prime | composite number |
| Unique factors | 1 | 3 |
| Total factors | 1 | 3 |
| Prime factorization | 210011 | 31 × 471 × 1491 |
| Prime factorization | 21001 | 3 × 47 × 149 |
| Divisors count | 2 | 8 |
| Divisors | 1, 21001 | 1, 3, 47, 141, 149, 447, 7003, 21009 |
| Number of properties | 5 | 0 |
| Chen primes | 1162nd | |
| Harmonic primes | 867th | |
| Isolated primes | 1648th | |
| Primes | 2361st | |
| Pythagorean primes | 1173rd | |
| Roman numberals | ||
| Base 2 | 1010010000010012 | 1010010000100012 |
| Base 3 | 10012102113 | 10012110103 |
| Base 4 | 110200214 | 110201014 |
| Base 5 | 11330015 | 11330145 |
| Base 6 | 2411216 | 2411336 |
| Base 7 | 1151417 | 1151527 |
| Base 8 | 510118 | 510218 |
| Base 9 | 317249 | 317339 |
| Base 10 | 2100110 | 2100910 |
| Base 11 | 1486211 | 1486a11 |
| Base 12 | 101a112 | 101a912 |
| Base 13 | 973613 | 974113 |
| Base 14 | 792114 | 792914 |
| Base 15 | 635115 | 635915 |
| Base 16 | 520916 | 521116 |