**Numbers n such that the sum of divisors of n is a pentagonal number.**

*1, 6, 11, 104, 116, 129, 218, 363, 408, 440, 481, 534, 566, 568, 590, 638, 646, 684*

*2 seqfan posts*

Index of A-numbers in seqfan: by ascending order by month by frequency by keyword

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