18 =2 x 9 = 2 x 3²
30 = 3 x 10 = 2 x 3 x 5
cmmdc = 2 x 3 = 6
24 = 8 x 3 = 2³ x 3
36 = 4 x 9 = 2² x 3²
cmmdc = 2² x 3 = 4 x 3 = 12
18 = 2 x 9 = 2 x 3²
19 = numar prim
cmmdc = 1
