102966

Appears in sequences

• Composite numbers k such that sigma(k) / d(k) is prime.at n=35A048969
• Numbers k such that 12^k == -1 (mod k-1).at n=5A055695
• usigma(n) = 2n + d(n), where d(n) is the number of divisors of n.at n=30A063829
• Numbers k such that s(k) = 2*k, where s(k) is the sum of divisors of k that have a square factor (A162296).at n=35A322609
• Primitive terms of A051487.at n=35A346694