Least k such that k is the product of n distinct primes and sigma(k) is an n-th power.
A281140
Least k such that k is the product of n distinct primes and sigma(k) is an n-th power.
Terms
- a(0) =2a(1) =22a(2) =102a(3) =510a(4) =90510a(5) =995610a(6) =11616990a(7) =130258590a(8) =1483974030
External references
- oeis: A281140