Compare 1819 vs 1820
| Property | 1819 | 1820 |
|---|---|---|
| Type | semiprime | composite number |
| Unique factors | 2 | 4 |
| Total factors | 2 | 5 |
| Prime factorization | 171 × 1071 | 22 × 51 × 71 × 131 |
| Prime factorization | 17 × 107 | 2 × 2 × 5 × 7 × 13 |
| Divisors count | 4 | 24 |
| Divisors | 1, 17, 107, 1819 | 1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 65, 70, 91, 130, 140, 182, 260, 364, 455, 910, 1820 |
| Number of properties | 1 | 0 |
| Semiprimes | 523rd | |
| Roman numberals | MDCCCXIX | MDCCCXX |
| Base 2 | 111000110112 | 111000111002 |
| Base 3 | 21111013 | 21111023 |
| Base 4 | 1301234 | 1301304 |
| Base 5 | 242345 | 242405 |
| Base 6 | 122316 | 122326 |
| Base 7 | 52067 | 52107 |
| Base 8 | 34338 | 34348 |
| Base 9 | 24419 | 24429 |
| Base 10 | 181910 | 182010 |
| Base 11 | 140411 | 140511 |
| Base 12 | 107712 | 107812 |
| Base 13 | a9c13 | aa013 |
| Base 14 | 93d14 | 94014 |
| Base 15 | 81415 | 81515 |
| Base 16 | 71b16 | 71c16 |