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Erdős problem / erdos

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Problem 469

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  1. vf_b7ecdadceed49988

    theoretical

    Erdős Problem #469: declared status 'open'. Formalized: yes. Let AA be the set of all nn such that n=d1++dkn=d_1+\cdots+d_k with did_i distinct proper divisors of nn, but this is not true for any mnm\mid n with m<nm<n. DoesnA1n\sum_{n\in A}\frac{1}{n}converge? Prize: no. OEIS: A006036, A119425. Tags: divisors, number theory.

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