171532242

Appears in sequences

• Numbers k such that sigma(k) + tau(k) is a prime.at n=23A064205
• Bhaskara twins: n such that 2*n^2 = X^3 and 2*n^3 = Y^2.at n=20A106318
• Numbers k such that phi(tau(k)) = rad(k).at n=16A173617
• Numbers k such that the Diophantine equation x^3 + y^3 + 2*z^3 = k has nontrivial primitive parametric solutions.at n=29A338933
• Dirichlet g.f.: Product_{k>=2} 1 / (1 - k^(-s))^(k^6).at n=20A343286