Nonunitary perfect numbers: k is the sum of its nonunitary divisors; i.e., k = sigma(k) - usigma(k).
A064591
Nonunitary perfect numbers: k is the sum of its nonunitary divisors; i.e., k = sigma(k) - usigma(k).
Terms
- a(0) =24a(1) =112a(2) =1984a(3) =32512a(4) =134201344a(5) =34359476224a(6) =549754765312
External references
- oeis: A064591