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