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Tau numbers, natural density, and Hardy and Wright’s theorem 437. (English) Zbl 0713.11002
Denote by $$\tau(n)$$ the number of divisors of $$n$$ and call an integer $$n$$ a Tau number, if $$\tau(n)$$ divides $$n$$. The authors show that the natural density of the set of Tau numbers is $$0$$.
Reviewer: T.Maxsein

##### MSC:
 11A05 Multiplicative structure; Euclidean algorithm; greatest common divisors 11B83 Special sequences and polynomials
##### Keywords:
natural density of the set of Tau numbers
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