[seqfan] Re: sigma_2(n)*sigma_3(n)/sigma(n)

Frank Adams-watters franktaw at netscape.net
Sun Oct 28 20:44:39 CET 2018

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I have a stronger conjecture:

sigma_j(n) * sigma_k(n) is divisible by sigma_{gcd(j,k)}(n).

Franklin T. Adams-Watters

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