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Numbers n such that (sigma(n)-n)/(tau(n)-1) is a perfect number.
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%I #7 Nov 15 2012 22:12:09

%S 30,121,252,8432,982081,479499604,1912369152,2180771840

%N Numbers n such that (sigma(n)-n)/(tau(n)-1) is a perfect number.

%C a(9) > 10^10. - _Donovan Johnson_, Nov 15 2012

%F Numbers n such that (sigma(n)-n)/(tau(n)-1) is a perfect number.

%K nonn

%O 1,1

%A _Zdenek Cervenka_, Nov 15 2012

%E a(6)-a(8) from _Donovan Johnson_, Nov 15 2012