68593

Appears in sequences

• RMS numbers: numbers n such that root mean square of divisors of n is an integer.at n=16A140480
• Composite RMS numbers: composite numbers c such that root mean square of divisors of c is an integer.at n=12A158287
• Composite squarefree numbers n such that each p-sopfr(n) divides n+sopfr(n), where p runs through the prime factors of n, and where sopfr(n) is the sum of the prime factors of n (A001414).at n=6A228303
• Let p = n-th prime == 3 mod 8; a(n) = sum of quadratic residues mod p that are > p/2.at n=30A282722
• Numbers m such that the arithmetic mean and the quadratic mean (the root mean square) of the divisors of m are both integers.at n=16A327055