Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).
%I #2 Mar 30 2012 17:22:40
%S 6,120,55440,367567200,288807105787200,1970992304700453905270400,
%T 46015447651610234928592313897306120347488000,
%U 20945137389024582113645213620899991935836129981347124754955196200225728000
%N Least colossally abundant number c with sigma(c)/c >= n.
%C See A110443 for the indices of these numbers in A004490. A073751 contains a program for quickly computing colossally abundant numbers.
%Y Cf. A004490 (colossally abundant numbers), A023199 (least number k such that sigma(k)/k >= n).
%K nonn
%O 2,1
%A _T. D. Noe_, Jul 20 2005