How many of the numbers from the set {1,2,3...50} have a perfect square factor other than one?

You have: 1, 2, 3, 4, 5, 6, 7 =6 perfect square FACTORS. Their perfect squares are:1, 4, 9, 16, 25, 36, 49.

it's 19... but thanks for trying! I appreciate the help

We have these integers

4, 8, 9, 12, 16, 18, 20, 24, 25, 27, 28, 32, 36, 40, 44, 45, 48, 49, 50

(19 integers )

Thanks CPhill!