Question 11896
Try this!

720 = 2 * 360
360 = 2 * 180
180 = 2 * 90
90 = 2 * 45
45 = 3 * 15
15 = 3 * 5
5 = 5 * 1
So 720 = 2*2*2*2*3*3*5 Notice that all the factors are prime numbers.

You can also write this as: {{{720 = 2^4*3^2*5}}}