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Positive integers n for which the number of divisors of n^n is a square.
2

%I #6 Jul 09 2014 16:39:57

%S 1,3,4,6,8,10,14,15,21,22,26,33,34,35,36,38,39,46,51,55,57,58,60,62,

%T 65,69,74,77,82,84,85,86,87,91,93,94,95,100,106,111,115,118,119,120,

%U 122,123,129,133,134,141,142,143,145,146

%N Positive integers n for which the number of divisors of n^n is a square.

%o (PARI) isok(n) = issquare(numdiv(n^n)); \\ _Michel Marcus_, Jul 09 2014

%Y Cf. A062319

%K nonn

%O 1,2

%A _John W. Layman_, Feb 16 2010