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Numbers n such that sigma(n)*tau(n) is a perfect number.
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%I #11 Aug 22 2013 16:25:32

%S 2,13,3554677,7339129,8125441,910156807,2080358881,14914915687

%N Numbers n such that sigma(n)*tau(n) is a perfect number.

%C a(9) > A002182(111). - _Donovan Johnson_, Aug 22 2013

%F Numbers n such that sigma(n)*tau(n) is a perfect number.

%Y Cf. A000005, A000203, A000396.

%K nonn

%O 1,1

%A _Zdenek Cervenka_, Nov 15 2012

%E a(6)-a(7) from _Donovan Johnson_, Nov 15 2012

%E a(8) from _Donovan Johnson_, Aug 22 2013