Compare 13720 vs 13721
| Property | 13720 | 13721 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 3 | 1 |
| Total factors | 7 | 1 |
| Prime factorization | 23 × 51 × 73 | 137211 |
| Prime factorization | 2 × 2 × 2 × 5 × 7 × 7 × 7 | 13721 |
| Divisors count | 32 | 2 |
| Divisors | 1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 98, 140, 196, 245, 280, 343, 392, 490, 686, 980, 1372, 1715, 1960, 2744, 3430, 6860, 13720 | 1, 13721 |
| Number of properties | 0 | 6 |
| Chen primes | 823rd | |
| Harmonic primes | 583rd | |
| Primes | 1623rd | |
| Pythagorean primes | 805th | |
| Twin primes (1st member) | 255th | |
| Ulam primes | 119th | |
| Roman numberals | ||
| Base 2 | 110101100110002 | 110101100110012 |
| Base 3 | 2002110113 | 2002110123 |
| Base 4 | 31121204 | 31121214 |
| Base 5 | 4143405 | 4143415 |
| Base 6 | 1433046 | 1433056 |
| Base 7 | 550007 | 550017 |
| Base 8 | 326308 | 326318 |
| Base 9 | 207349 | 207359 |
| Base 10 | 1372010 | 1372110 |
| Base 11 | a34311 | a34411 |
| Base 12 | 7b3412 | 7b3512 |
| Base 13 | 632513 | 632613 |
| Base 14 | 500014 | 500114 |
| Base 15 | 40ea15 | 40eb15 |
| Base 16 | 359816 | 359916 |