Question

Cati divizori are fiecare dintre numerele : 3131,280,490,725

Answer 1

3131 = 31 x 101
D = {1, 31, 101, 3131}
280 = 2 x 140 = 2 x 2 x 70 = 2 x 2 x 2 x 35 = 2 x 2 x 2 x 5 x 7
D ={1, 2, 4, 5, 7, 8, 10, 14, 20, 35, 40, 140, 280}
490 = 7 x 7 x 2 x 5
D = {1, 2, 5, 7, 10, 14, 35, 49, 70, 98, 245, 490} 
725 = 25 x 29 = 5 x 5 x 29
D = {1, 5, 25, 29, 25, 145, 725}