Karlanna places 600 marbles into m total boxes such that each box contains an equal number of marbles. There is more than one box, and each box contains more than one marble. For how many values of m can this be done?
I just looked up all of the factors of 600:
Just count them up (but exclude '1' as there is more than one box) and 600 because there is more than one marble in each box.