Nonunitary triply perfect numbers: the sum of the nonunitary divisors of n is 3n; i.e., sigma(n) - usigma(n) = 3n.

A064593

Nonunitary triply perfect numbers: the sum of the nonunitary divisors of n is 3n; i.e., sigma(n) - usigma(n) = 3n.

Terms

    a(0) =186076800a(1) =3456573120a(2) =18924364800a(3) =325377803520

External references