All divisors of the number 21
Full list of divisors:
| Divisor | Prime |
|---|---|
| 1 | |
| 3 | |
| 7 | |
| 21 |
Total natural divisors: 4, there are prime from them 2.
Sum of all divisors:: 32.
Numbers divisible by 21
21, 42, 63, 84, 105, 126, 147, 168, 189, 210, 231, 252, 273, 294, 315, ...
The smallest: 21.
How many two digit numbers are divisible by 21
21 (the smallest), 42, 63, 84 (the largest), There are 4 two digit numbers divisible by 21.
Three-digit numbers divisible by 21
105 (the smallest), 126, 147, 168, 189, 210, ..., 987 (the largest), There are 43 three digit numbers divisible by 21.
Above are only those numbers that can be divided by 21 without remainder.
- We have the possibility of self-calculations, use the form below.