206166804480
domain: N
Appears in sequences
- Numbers n such that sigma(n)/n = 9/2.at n=4A141645
- Numbers m with half-integral abundancy index, sigma(m)/m = k+1/2 with integer k.at n=15A159907
- Numbers n such that antisigma(n) mod n = 0, where antisigma(n) = A024816(n) = sum of numbers less than n which do not divide n.at n=16A242484
- Numbers m such that g(m) = (m * tau(m) / sigma(m)), h(m) = (m * sigma(m)) / tau(m) and k(m) = (tau(m) * sigma(m)) / m are all integers.at n=20A333639