How do you get the answer for prime factorization?

Answer 1

It's done by dividing your target number by prime numbers until all the factors are prime. Some people use factor trees, rainbows, ladders, fireworks, etc. as visual aids.

Example 210:

210

105,2

35,3,2

7,5,3,2

The prime factorization of 210 is 2 x 3 x 5 x 7.