Compare 990129 vs 990131
| Property | 990129 | 990131 |
|---|---|---|
| Type | composite number | semiprime |
| Unique factors | 3 | 2 |
| Total factors | 3 | 2 |
| Prime factorization | 31 × 71 × 471491 | 171 × 582431 |
| Prime factorization | 3 × 7 × 47149 | 17 × 58243 |
| Divisors count | 8 | 4 |
| Divisors | 1, 3, 7, 21, 47149, 141447, 330043, 990129 | 1, 17, 58243, 990131 |
| Number of properties | 0 | 1 |
| Semiprimes | 208060th | |
| Roman numberals | ||
| Base 2 | 111100011011101100012 | 111100011011101100112 |
| Base 3 | 12120220121103 | 12120220121123 |
| Base 4 | 33012323014 | 33012323034 |
| Base 5 | 2231410045 | 2231410115 |
| Base 6 | 331155336 | 331155356 |
| Base 7 | 112624507 | 112624527 |
| Base 8 | 36156618 | 36156638 |
| Base 9 | 17681739 | 17681759 |
| Base 10 | 99012910 | 99013110 |
| Base 11 | 61699811 | 61699a11 |
| Base 12 | 3b8ba912 | 3b8bab12 |
| Base 13 | 28889a13 | 28889c13 |
| Base 14 | 1bab9714 | 1bab9914 |
| Base 15 | 14858915 | 14858b15 |
| Base 16 | f1bb116 | f1bb316 |