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A239869
Numbers k that divide A239868(k).
1
1, 6, 7, 9, 14, 21, 37, 69, 670, 3471, 3477, 5160, 9500, 15432, 67054, 302224, 791733, 861781, 1425779, 6242689, 71511220, 187308565, 318733908, 336841318, 343858368, 499742949, 4088136488, 4172097579, 9981207398
OFFSET
1,2
COMMENTS
A239868 = partial sums of A054024, where A054024(n) = sigma(n) mod n.
Values of k for which A239868(k) / k is an integer.
a(30) > 3*10^11. - Giovanni Resta, Mar 29 2014
EXAMPLE
a(4) = 9 is in the sequence because A239868(9) / 9 = 18 / 9 = 2 is an integer.
PROG
(Magma) [n: n in [1..10000] | u eq 0 where u is ((&+[SumOfDivisors (k) mod k: k in [1..n]]) mod n)]
CROSSREFS
KEYWORD
nonn
AUTHOR
Jaroslav Krizek, Mar 28 2014
EXTENSIONS
a(16)-a(29) from Giovanni Resta, Mar 29 2014
STATUS
approved