Question 612341
Algebra.com has solvers to find the factors of any number. 

<p>*[invoke factor_any_number_1 80]
<p>You can see from the work shown, that obviously 5 is a prime factor, and so is 2 because 2 is not divisible by anything but itself and 1.

<p>So, to find factors, you can use the solver (or factor it using logic), and look for the numbers that are not divisible by anything other than itself and 1. Try it for the other numbers.