Compare 28 vs 49
| Property | 28 | 49 |
|---|---|---|
| Type | composite number | semiprime |
| Unique factors | 2 | 1 |
| Total factors | 3 | 2 |
| Prime factorization | 22 × 71 | 72 |
| Prime factorization | 2 × 2 × 7 | 7 × 7 |
| Divisors count | 6 | 3 |
| Divisors | 1, 2, 4, 7, 14, 28 | 1, 7, 49 |
| Number of properties | 0 | 1 |
| Semiprimes | 17th | |
| Roman numberals | XXVIII | XLIX |
| Base 2 | 111002 | 1100012 |
| Base 3 | 10013 | 12113 |
| Base 4 | 1304 | 3014 |
| Base 5 | 1035 | 1445 |
| Base 6 | 446 | 1216 |
| Base 7 | 407 | 1007 |
| Base 8 | 348 | 618 |
| Base 9 | 319 | 549 |
| Base 10 | 2810 | 4910 |
| Base 11 | 2611 | 4511 |
| Base 12 | 2412 | 4112 |
| Base 13 | 2213 | 3a13 |
| Base 14 | 2014 | 3714 |
| Base 15 | 1d15 | 3415 |
| Base 16 | 1c16 | 3116 |