Erdős Problem #943

Let $A$ be the set of powerful numbers (if $p\mid n$ then $p^2\mid n$). Is it true that\[1_A\ast 1_A(n)=n^{o(1)}\]for every $n$?

#943: [Er76d]

number theory | powerful

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This page was last edited 31 October 2025.

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Formalised statement? Yes
Related OEIS sequences: Possible

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