Réponses

2014-02-12T10:20:38+01:00
6 = 2x3 = 1+2+3
1+2+3 = 6
28 = 4x7 = 1+2+4+7+14
1+2+4+7+14 = 28
496 = 16x31 = 1+2+4+8+16+31+62+124+248
1+2+4+8+16+31+62+124+248 = 496