What is the factor rainbow for 15?

A factor rainbow just shows the factors that make up that number. For example if you were looking fo the factors of 12 they would be 1 2 3 4 6 and 12. To make the rainbow part just draw lines from 1 to 12 from 2 to 6 from 3 to 4 . the factors for 15 are 1,3,5,and 15.