A239877 Numbers k that divide A239876(k).

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

Author

Jaroslav Krizek, Mar 29 2014

Keywords

• nonn

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

Examples

			a(4) = 14 is in the sequence because A239876(14) / 14 = 70 / 14 = 5 is an integer.
		

Crossrefs

Cf. A024816, A229110, A239876.

Programs

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)]

Extensions

a(13)-a(25) from Giovanni Resta, Mar 29 2014