64730

Appears in sequences

• Consider the sequence {b(m)} of composite numbers (excluding 1); sequence gives values of b(m) where gcd(m, b(m)) increases.at n=35A058012
• Numbers k such that sopf(k) - pi(k) = tau(k).at n=11A064445
• Numbers n such that sigma(n)=2n-phi(phi(n)).at n=31A110073