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A218411
Numbers k for which sigma(k)/k - 4/7 is an integer.
5
280, 18620, 411264, 804384, 871416, 1222144, 1284192, 164989440, 270138960, 318729600, 326781000, 396168192, 481572000, 623397600, 675347400, 995248800, 3444711424, 4426793280, 307030348800, 465036042240, 880719036120
OFFSET
1,1
COMMENTS
a(19) > 10^11. - Donovan Johnson, Oct 31 2012
a(22) > 10^12. - Giovanni Resta, Nov 04 2012
CROSSREFS
KEYWORD
nonn
AUTHOR
Zdenek Cervenka, Oct 28 2012
EXTENSIONS
a(8)-a(18) from Donovan Johnson, Oct 31 2012
a(19)-a(21) from Giovanni Resta, Nov 04 2012
STATUS
approved