Compare 9920 vs 9931
| Property | 9920 | 9931 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 3 | 1 |
| Total factors | 8 | 1 |
| Prime factorization | 26 × 51 × 311 | 99311 |
| Prime factorization | 2 × 2 × 2 × 2 × 2 × 2 × 5 × 31 | 9931 |
| Divisors count | 28 | 2 |
| Divisors | 1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 155, 160, 248, 310, 320, 496, 620, 992, 1240, 1984, 2480, 4960, 9920 | 1, 9931 |
| Number of properties | 0 | 4 |
| Emirps | 238th | |
| Long primes | 465th | |
| Primes | 1225th | |
| Twin primes (2nd member) | 205th | |
| Roman numberals | ||
| Base 2 | 100110110000002 | 100110110010112 |
| Base 3 | 1111211023 | 1111212113 |
| Base 4 | 21230004 | 21230234 |
| Base 5 | 3041405 | 3042115 |
| Base 6 | 1135326 | 1135516 |
| Base 7 | 406317 | 406457 |
| Base 8 | 233008 | 233138 |
| Base 9 | 145429 | 145549 |
| Base 10 | 992010 | 993110 |
| Base 11 | 74a911 | 750911 |
| Base 12 | 58a812 | 58b712 |
| Base 13 | 469113 | 469c13 |
| Base 14 | 388814 | 389514 |
| Base 15 | 2e1515 | 2e2115 |
| Base 16 | 26c016 | 26cb16 |