70=7,14,28,42
140=14,28,56,84
360=36,72,144,216
520=52,104,208,312
720=72,144,288,432
840=84,168,336,672
70=7,14,28,42
140=14,28,56,84
360=36,72,144,216
520=52,104,208,312
720=72,144,288,432
840=84,168,336,672