Bonjour,
75
75/ 3 =25
25/5 =5
=> 3*5*5
630
630/2 =315
315/3 =105
105/3 35
35/5 =7
=>2*3*3*5*7
3 192
3 192/2 =1 596
1 596/2 =798
798/2 =399
399/3 =133
133/7 =19
=>2*2*2*3*7*19
7 986
7986/2 =3993
3993/3 =1331
1331/11 = 121
121/11 =11
=>2*3*11*11*11
17 745
17 745/3 = 5915
5915/5= 1183
1183/7 =169
169/13 =13
=> 3*5*7*13*13