1686400

Appears in sequences

• Numbers k such that A048675(sigma(k)) is equal to A048675(2*k).at n=31A331751
• Numbers x such that there exist two integers 0<x<=y and z>0 such that sigma(x)^2 = sigma(y)^2 = x^2 + y^2 + z^2.at n=18A385356