a) fatoração 2,2,3,5 = 60
b) 2,2,2,3 = 24
c) 2,2,3,3,5 = 180
d) 2,2,2,2,5 = 80
e) 2,2,2,2,2,5= 160
f) 2,2,3,3,3= 108
