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Sagot :

VINS

bonjour

280 = 2 x 140

140 = 2 x 70

70 = 2 x 35

35 =  5 x 7

7  = 7 x 1

280 = 2 ³ x 5 x 7

Bjr,

280 = 140 * 2 = 70 * 2 * 2 = 35 * 2 * 2 * 2 = 7 * 5 * 2 * 2 * 2.

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