A110442 Least colossally abundant number c with sigma(c)/c >= n.

6, 120, 55440, 367567200, 288807105787200, 1970992304700453905270400, 46015447651610234928592313897306120347488000, 20945137389024582113645213620899991935836129981347124754955196200225728000

Offset

2,1

Comments

See A110443 for the indices of these numbers in A004490. A073751 contains a program for quickly computing colossally abundant numbers.

Links

Amiram Eldar, Table of n, a(n) for n = 2..13

Crossrefs

Cf. A000203 (sigma), A004490 (colossally abundant numbers), A023199 (least number k such that sigma(k)/k >= n), A073751, A110443.

Sequence in context: A355757 A007539 A040996 * A371206 A137149 A317888

Adjacent sequences: A110439 A110440 A110441 * A110443 A110444 A110445

Keyword

nonn

Author

T. D. Noe, Jul 20 2005

Status

approved