number-theory / Number Theory, Divisors

Erdős Problem #469

Does the sum of the reciprocals of all primitive pseudoperfect numbers converge?

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number-theoryJul 21, 2026Significance 10/100Registry: lean verified

Erdős Problem #469

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Does the sum of the reciprocals of all primitive pseudoperfect numbers converge?

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Does the sum of the reciprocals of all primitive pseudoperfect numbers converge?

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Erdős Problem #469 — Mathematical Frontier Network