Compare 721 vs 729
| Property | 721 | 729 |
|---|---|---|
| Type | semiprime | composite number |
| Unique factors | 2 | 1 |
| Total factors | 2 | 6 |
| Prime factorization | 71 × 1031 | 36 |
| Prime factorization | 7 × 103 | 3 × 3 × 3 × 3 × 3 × 3 |
| Divisors count | 4 | 7 |
| Divisors | 1, 7, 103, 721 | 1, 3, 9, 27, 81, 243, 729 |
| Number of properties | 1 | 0 |
| Semiprimes | 219th | |
| Roman numberals | DCCXXI | DCCXXIX |
| Base 2 | 10110100012 | 10110110012 |
| Base 3 | 2222013 | 10000003 |
| Base 4 | 231014 | 231214 |
| Base 5 | 103415 | 104045 |
| Base 6 | 32016 | 32136 |
| Base 7 | 20507 | 20617 |
| Base 8 | 13218 | 13318 |
| Base 9 | 8819 | 10009 |
| Base 10 | 72110 | 72910 |
| Base 11 | 5a611 | 60311 |
| Base 12 | 50112 | 50912 |
| Base 13 | 43613 | 44113 |
| Base 14 | 39714 | 3a114 |
| Base 15 | 33115 | 33915 |
| Base 16 | 2d116 | 2d916 |