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题目链接：divcntk Let σ0(n)σ0(n)\sigma_0(n) be the number of positive divisors of nnn. For example, σ0(1)=1σ0(1)=1\sigma_0(1) = 1, σ0(2)=2σ0(2)=2\sigma_0(2) = 2 and σ0(6)=4σ0(6)=4\sigma_0(6) = 4. Let Sk...