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The distribution functions of $\sigma(n)/n$ and $n/\phi(n)$, II
The distribution functions math
2010/11/23
Let $\sigma(n)$ be the sum of the positive divisors of $n$, and let $A(t)$ be the natural density of the set of positive integers $n$ satisfying $\sigma(n)/n \ge t$. We give an improved asymptotic re...