Question 254847
(1,2,3,4,5,6,7,8,9,10)
2=2
3=3
4=2*2
5=5
6=2*3
7=7
8=2*2*2
9=3*3
10=2*5
Look for the max. # of times each prime is used. 
N=(2*2*2)*(3*3)*5*7=2520