2876211

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=17A212610
• The larger companion to the primitive deficient numbers in A212611.at n=8A212612
• Numbers n such that rad(sigma(n)) = 2*rad(n), where the "radical" of n, rad(n), is A007947 and sigma(n) is the sum of the divisors of n.at n=6A238330
• Odd integers k such that sigma(k)^2 is divisible by k.at n=10A263983
• Odd numbers k for which A000005(2*k) >= A017665(2*k), where A000005 is the number of divisors function, and A017665 is the numerator of the abundancy ratio, sigma(k)/k.at n=18A388277