714954240

Appears in sequences

• Numbers k whose average divisor is nonintegral and divides k.at n=10A046999
• Numbers k such that gcd(sigma(k),k) = k/5.at n=32A067237
• Numbers k for which sigma(k)/k - 4/5 is an integer.at n=6A218427
• Numbers n such that tau(n)*sigma(n) divides n^2.at n=21A245787
• Harmonic numbers m from A001599 such that m*(m-tau(m))/sigma(m) is an integer h, where k-tau(k) is the number of nondivisors of k (A049820), tau(k) is the number of divisors of k (A000005), and sigma(k) is the sum of the divisors of k (A000203).at n=25A325021
• 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=11A333639