How can prove σ(n)=Σd<Σ1\d where σ(n) maen sum of divisor The index of first Σ is d|n and the second Σ is d<n
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Originally Posted by ha11 How can prove σ(n)=Σd<Σ1\d where σ(n) maen sum of divisor The index of first Σ is d|n and the second Σ is d<n This makes no sense. You're claiming that ?
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