The prime factorization of 315 is:
$$ 315 = 3\cdot3\cdot5\cdot7 $$Which is the same as :
$$ 315 = 3^{2}\cdot5\cdot7 $$Prime factorization can be nicely visualized by creating a factorization tree.
| 315 can be written as 5 × 63. |
|
| 63 can be written as 3 × 21. |
|
| 21 can be written as 3 × 7. |
|
| The end nodes are the prime factors of the number 315. |
|