448335

Appears in sequences

• Pairs of primitive deficient numbers having the same value of sigma(k)/k, listed by increasing value of the larger of the two k values.at n=9A212610
• The larger companion to the primitive deficient numbers in A212611.at n=4A212612
• Numbers n such that the set of prime divisors of n is equal to the set of prime divisors of sum of proper divisors of n while n is not in A027598.at n=27A286876
• Odd numbers k such that the set of distinct prime divisors of k is equal to the set of distinct prime divisors of the sum of proper divisors of k.at n=1A286884
• Odd numbers k such that rad(k) divides sigma(k).at n=27A336554
• Numbers m such that there are at least two smaller numbers k < m with the same harmonic mean of divisors as m.at n=1A348697