[seqfan] Re: Number with Sigma(n)/n a rational power

zbi74583.boat at orange.zero.jp zbi74583.boat at orange.zero.jp
Thu Dec 12 01:44:39 CET 2013


    I found RMPN k=(p/q)^r

    Sigma(n)=k*n

    k=(6/5)^9
    2^15*3*5^16*7^3*11*17*19*29*41*43*257*409*2393*178793+6662063*466344409

    k=(4/3)^6
    2^7*3^11*5^2*7^2*13*17*19^2*31*37*73*127



    Yasutushi






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