Compare 1800 vs 1801
| Property | 1800 | 1801 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 3 | 1 |
| Total factors | 7 | 1 |
| Prime factorization | 23 × 32 × 52 | 18011 |
| Prime factorization | 2 × 2 × 2 × 3 × 3 × 5 × 5 | 1801 |
| Divisors count | 36 | 2 |
| Divisors | 1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 25, 30, 36, 40, 45, 50, 60, 72, 75, 90, 100, 120, 150, 180, 200, 225, 300, 360, 450, 600, 900, 1800 | 1, 1801 |
| Number of properties | 0 | 7 |
| Chen primes | 174th | |
| Cuban primes 1 | 13th | |
| Harmonic primes | 99th | |
| Isolated primes | 168th | |
| Lucky primes | 66th | |
| Primes | 279th | |
| Pythagorean primes | 136th | |
| Roman numberals | MDCCC | MDCCCI |
| Base 2 | 111000010002 | 111000010012 |
| Base 3 | 21102003 | 21102013 |
| Base 4 | 1300204 | 1300214 |
| Base 5 | 242005 | 242015 |
| Base 6 | 122006 | 122016 |
| Base 7 | 51517 | 51527 |
| Base 8 | 34108 | 34118 |
| Base 9 | 24209 | 24219 |
| Base 10 | 180010 | 180110 |
| Base 11 | 139711 | 139811 |
| Base 12 | 106012 | 106112 |
| Base 13 | a8613 | a8713 |
| Base 14 | 92814 | 92914 |
| Base 15 | 80015 | 80115 |
| Base 16 | 70816 | 70916 |