divizori improprii : 1 si el insusi si
proprii toate numerele care se impart exact la nr dat
deci
1 are ca divizor { 1}
2 are {1,2}
5 are {1,5}
10 are {1,2,5,10}
16=2×8=2×2³ are {1,2,4,8,16)
72=2³+3² deci are divizori :{1,2,3,2², 2³, 3,3², 2×3, 2×3², 2²×3, 2²×3², 2³×3
sau
=(1 ,2,3,4, 8, 3,9, 6, 18, 12, 36, 72}=
72 are divizorii : {1,2,3,4,6,8,9,12,18,36,72}
