divizorii numerelor:
1001=1,7,11,13,77,91,143,1001
125=1,5,25,125
91=1,7,13,91
19=1,19
35=1,5,7,35
multipli lui 7 =7,14, 21,28,35,42,49,56,63,70,77,84,91,98 <100
multipli lui 11 =11,22,33,44,55,66,77,88,99,110,121,132<142
multipli lui 5 : 24 < 25,30,35,40,45<48
multipli lui 17 : 35 <51,68,85,102,119, 136,153,170,187<200
multipli lui 13 de doua cifre =13,26,39,52,65,78,91
multipli 234 de trei cifre =234,468,702,936