Compare 851 vs 861
| Property | 851 | 861 |
|---|---|---|
| Type | semiprime | composite number |
| Unique factors | 2 | 3 |
| Total factors | 2 | 3 |
| Prime factorization | 231 × 371 | 31 × 71 × 411 |
| Prime factorization | 23 × 37 | 3 × 7 × 41 |
| Divisors count | 4 | 8 |
| Divisors | 1, 23, 37, 851 | 1, 3, 7, 21, 41, 123, 287, 861 |
| Number of properties | 1 | 0 |
| Semiprimes | 257th | |
| Roman numberals | DCCCLI | DCCCLXI |
| Base 2 | 11010100112 | 11010111012 |
| Base 3 | 10111123 | 10112203 |
| Base 4 | 311034 | 311314 |
| Base 5 | 114015 | 114215 |
| Base 6 | 35356 | 35536 |
| Base 7 | 23247 | 23407 |
| Base 8 | 15238 | 15358 |
| Base 9 | 11459 | 11569 |
| Base 10 | 85110 | 86110 |
| Base 11 | 70411 | 71311 |
| Base 12 | 5ab12 | 5b912 |
| Base 13 | 50613 | 51313 |
| Base 14 | 44b14 | 45714 |
| Base 15 | 3bb15 | 3c615 |
| Base 16 | 35316 | 35d16 |