9.
a)Divizorii:
D9={1,3,9}
D28={1,2,4,7,14,28}
D64={1,2,4,8,16,32,64}
D71={1,71}
D40={1,2,4,5,8,10,20,40}
b)Multiplii:
M9={0,9,18,27,36}
M28={0,28,56,84,112}
M64={0,64,128,192,256}
M71={0,71,142,213,284}
M40={0,40,80,120,160}
10.M5={100110; 100120; 100130; 100140; 100150; 100160; 100170; 100180; 100190; 100200}
