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A232704
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Numbers n such that sigma(n)+n divides sigma(n^2).
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1
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84889, 376443, 1260615, 2703555, 4883751, 7551847, 8894695, 9387081, 10142181, 12600825, 39450985, 57924711, 72978693, 73534503, 166503105, 428777995, 563715879, 578643967, 583540893, 1181555907, 1598569785, 1779455211, 2917138191, 3078534559, 3318534361
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OFFSET
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1,1
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LINKS
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PROG
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(PARI) for(n=1, 10^8, if(sigma(n^2)%(sigma(n)+n)==0, print1(n ", "))) \\ Donovan Johnson, Nov 30 2013
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CROSSREFS
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Cf. A000203 (sigma(n) = sum of divisors of n).
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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