[seqfan] Square Friendly Number

[zbi74583.boat at orange.zero.jp]

    Hi,Seqfans

    I asked about "Square Friendly Number" to Michel Murcus.

    Sigma(x^2)=Sigma(y^2)

    He sent me the result which he computed.

    These are all k*4,k*5.
    If a term which is essentially different from 4,5 exists  then it is
interesting

    I wonder if 2^4,5^2 is the only one solution of the following

    Sigma(x^2)=Sigma(y^2), GCD(x,y)=1

    Could anyone tell me if the other term exist?



    Yasutoshi