1437599

Appears in sequences

• Composite numbers n such that the sum of divisors of n, sigma(n), divided by the number of divisors, d(n) and sigma(n) minus n are both rational squares.at n=29A049226
• a(n) = 4*n^4 + 8*n^3 - 4*n - 1 = (2*n^2 - 1)*(2*n^2 + 4*n + 1).at n=24A057769
• Numbers n such that sum of divisors, sigma(n), and sum of the proper divisors, sigma(n)-n, are both square.at n=23A176996
• Worst cases for Hart's one-line factorization (OLF) method with multiplier M = 1, see comments.at n=24A284522