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A239877
Numbers k that divide A239876(k).
1
1, 2, 6, 14, 23, 93, 95, 343, 1924, 13358, 27385, 54709, 150554, 445242, 581211, 589819, 14733535, 18859421, 19861702, 371619757, 775908129, 1076759948, 1083679128, 7402437933, 42679464436
OFFSET
1,2
COMMENTS
Values of k for which A239876(k) / k is an integer.
A239876 = partial sums of A229110 where A229110(n) = antisigma(n) mod n = A024816(n) mod n.
a(26) > 3*10^11. - Giovanni Resta, Mar 29 2014
EXAMPLE
a(4) = 14 is in the sequence because A239876(14) / 14 = 70 / 14 = 5 is an integer.
PROG
(Magma) [n: n in [1..1000] | u eq 0 where u is ((&+[(k*(k+1)div 2 - SumOfDivisors (k)) mod k: k in [1..n]]) mod n)]
CROSSREFS
KEYWORD
nonn
AUTHOR
Jaroslav Krizek, Mar 29 2014
EXTENSIONS
a(13)-a(25) from Giovanni Resta, Mar 29 2014
STATUS
approved