Compare 21605 vs 21613
| Property | 21605 | 21613 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 3 | 1 |
| Total factors | 3 | 1 |
| Prime factorization | 51 × 291 × 1491 | 216131 |
| Prime factorization | 5 × 29 × 149 | 21613 |
| Divisors count | 8 | 2 |
| Divisors | 1, 5, 29, 145, 149, 745, 4321, 21605 | 1, 21613 |
| Number of properties | 0 | 8 |
| Additive primes | 1126th | |
| Cousin primes (1st member) | 370th | |
| Left-truncatable primes | 172nd | |
| Lucky primes | 392nd | |
| Primes | 2428th | |
| Prime triplets (2nd member) | 185th | |
| Pythagorean primes | 1204th | |
| Twin primes (2nd member) | 369th | |
| Roman numberals | ||
| Base 2 | 1010100011001012 | 1010100011011012 |
| Base 3 | 10021220123 | 10021221113 |
| Base 4 | 111012114 | 111012314 |
| Base 5 | 11424105 | 11424235 |
| Base 6 | 2440056 | 2440216 |
| Base 7 | 1166637 | 1200047 |
| Base 8 | 521458 | 521558 |
| Base 9 | 325659 | 325749 |
| Base 10 | 2160510 | 2161310 |
| Base 11 | 1526111 | 1526911 |
| Base 12 | 1060512 | 1061112 |
| Base 13 | 9aac13 | 9ab713 |
| Base 14 | 7c3314 | 7c3b14 |
| Base 15 | 660515 | 660d15 |
| Base 16 | 546516 | 546d16 |