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A376879
Numbers that are abundant (A005101) and have no Zumkeller divisors.
0
748, 7544, 10184, 56816, 61904, 62416, 66928, 69488, 73616, 102416, 195316, 292604, 297908, 342225, 394144, 517024, 543968, 566236, 569228, 575212, 578204, 588676, 596156, 605132, 606628, 614108, 615604, 618596, 620092, 627572, 638044, 640096, 641036, 642532
OFFSET
1,1
COMMENTS
d is a Zumkeller divisor of n if and only if d is a divisor of n and is Zumkeller (A083207).
MAPLE
# The function 'isZumkeller' is defined in A376880.
select(n -> SumOfDivisors(n) > 2*n and not ormap(isZumkeller, Divisors(n)), [seq(1..11000)]);
CROSSREFS
KEYWORD
nonn
AUTHOR
Peter Luschny, Oct 20 2024
STATUS
approved