Compare 1215 vs 1220
| Property | 1215 | 1220 | 
|---|---|---|
| Type | composite number | composite number | 
| Unique factors | 2 | 3 | 
| Total factors | 6 | 4 | 
| Prime factorization | 35 × 51 | 22 × 51 × 611 | 
| Prime factorization | 3 × 3 × 3 × 3 × 3 × 5 | 2 × 2 × 5 × 61 | 
| Divisors count | 12 | 12 | 
| Divisors | 1, 3, 5, 9, 15, 27, 45, 81, 135, 243, 405, 1215 | 1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 610, 1220 | 
| Number of properties | 0 | 0 | 
| Roman numberals | MCCXV | MCCXX | 
| Base 2 | 100101111112 | 100110001002 | 
| Base 3 | 12000003 | 12000123 | 
| Base 4 | 1023334 | 1030104 | 
| Base 5 | 143305 | 143405 | 
| Base 6 | 53436 | 53526 | 
| Base 7 | 33547 | 33627 | 
| Base 8 | 22778 | 23048 | 
| Base 9 | 16009 | 16059 | 
| Base 10 | 121510 | 122010 | 
| Base 11 | a0511 | a0a11 | 
| Base 12 | 85312 | 85812 | 
| Base 13 | 72613 | 72b13 | 
| Base 14 | 62b14 | 63214 | 
| Base 15 | 56015 | 56515 | 
| Base 16 | 4bf16 | 4c416 |