745503

Appears in sequences

• Numbers n such that sigma(n) = 3*phi(n).at n=17A068391
• Numbers n such that sigma(n) = phi(3n).at n=24A074891
• Expansion of Sum_{0<i<j<k<l} q^(i+j+k+l)/( (1-q^i)*(1-q^j)*(1-q^k)*(1-q^l) )^2.at n=33A365664