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48=2*2*2*2*3 所以48的約數有1,2,3,4,6,8,12,16,24,48 所以拼成長方形的情况有: 1*48=48 2*24=48 3*16=48 4*12=48 6*8=48 12*4=48(重複) 16*3=48(重複) 24*2=48(重複) 48*1=48(重複) 所以有5種拼法
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