%I
%S 6,336,333312,5418319872,1584858562560
%N Least number m > 1 such that A000203(x)*x = m has exactly n solutions.
%C 6 = 6.
%C 336 = 6*28*2.
%C 333312 = 6*28*496*2*2.
%C 5418319872 = 6*28*496*8128*2*2*2.
%D R. K. Guy, Unsolved Problems in Theory of Numbers, SpringerVerlag, Third Edition, 2004, B11.
%e For n=3, 333312 has exactly 3 solutions: sigma(434)*434 = 333312, sigma(372)*372 = 333312, and sigma(336)*336 = 333312; therefore a(3) = 333312.
%Y Cf. A212489, A212327, A212373.
%K nonn,more
%O 1,1
%A _Naohiro Nomoto_, May 18 2012
%E a(5) from _Donovan Johnson_, May 20 2012
