Least Common Multiple and Greatest Common Factor Worksheets 4.) LCM Makes and L: The smallest prime number that goes into 24 and 32 is 2. Put the 2 on the outside of the L. Determine how many times 2 goes into 24 and write 12 underneath the L. Then do the same for how many times 2 goes into 32 and write 16 next to the number 12.