Prime Factorization of 21
Answer
21 = 3 × 7
Step by Step Solution
| Step | Number | Divide by | Result |
|---|---|---|---|
| 1 | 21 | 3 | 7 |
| 2 | 7 | 7 | 1 |
Prime Factors
The prime factors of 21 are: 3, 7
Try Other Numbers
Calculator
Want to find prime factors of a different number? Use our calculator:
Understanding Prime Factorization
The prime factorization of 21 shows how this number can be expressed as a product of prime numbers. In this case:
- We start with 21
- Break it down into its prime factors: 3, 7
- Final expression: 3 × 7