OFFSET
1,1
COMMENTS
LINKS
Charles R Greathouse IV, Table of n, a(n) for n=1..1587
Achim Flammenkamp, The Multiply Perfect Numbers Page
EXAMPLE
For n = 1 the a(1) = 120, sigma(120) / 120 = 360 / 120 = 3, i.e. > 2.
PROG
(PARI) isok(n) = sn = sigma(n)/n ; (type(sn) == "t_INT") && (sn > 2); \\ Michel Marcus, Oct 24 2013
CROSSREFS
KEYWORD
nonn
AUTHOR
Jaroslav Krizek, Oct 06 2009
EXTENSIONS
Extended by Charles R Greathouse IV, Oct 12 2009
STATUS
approved