PLEASE NOTE: I accidentally wrote GCD over their when I meant LCM
BTW:
60,12,6,30 GCD = 6
30,15,20,60 GCD = 5
60,12,4,20 GCD = 4
6,30,15,6 GCD = 3
6,12,4,6 GCD = 2
4,6,15,20 GCD = 1
so 60+30+20+15+12+6+6+4=153
