Hola mira los divisores de 64=1, 2, 4, 8, 16, 32, 64 -- 7.
divisores de 100=1, 2, 4, 5, 10, 20, 25, 50, 100 -- 9
divisores de 72=1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, 72 -- 11
divisores de 120=1,2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120 -- 16
Espero que te sirva SUERTE.