How do you set up a factor rainbow?

Answer 1

It's just like a factor tree, except the original number goes on the bottom and the factors go above it.

All composite numbers can be expressed as unique products of prime numbers. This is accomplished by dividing the original number and its factors by prime numbers until all the factors are prime. A factor rainbow can help you visualize this. Follow the steps in order.

Example: 210

7,5,3,2 (4.) Stop. All the factors are prime.

35,3,2 (3.) Divide by five.

105,2 (2.) Divide by three.

210 (1.) Divide by two.

2 x 3 x 5 x 7 = 210

That's the prime factorization of 210.