144的全部因数的倒数之和
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144的全部因数的倒数之和
144=2×2×2×2×3×3
1/2+1/2+1/2+1/2+1/3+1/3=2又3分之2
144=1×144=2×72=3×48=4×36=6×24=8×18=12×12
全部因数的倒数之和=1/1+1/144+1/2+1/72+1/3+1/48+1/4+1/36+1/6+1/24+1/8+1/18+1/12=4又1/36
144的全部因数的倒数之和
144=2×2×2×2×3×3
1/2+1/2+1/2+1/2+1/3+1/3=2又3分之2
144=1×144=2×72=3×48=4×36=6×24=8×18=12×12
全部因数的倒数之和=1/1+1/144+1/2+1/72+1/3+1/48+1/4+1/36+1/6+1/24+1/8+1/18+1/12=4又1/36