Smallest number m such that sigma(m) has exactly n distinct prime factors.
A152562
Smallest number m such that sigma(m) has exactly n distinct prime factors.
Terms
- a(0) =2a(1) =5a(2) =20a(3) =104a(4) =936a(5) =13842a(6) =188424a(7) =3249576a(8) =81239400a(9) =2388809736a(10) =59720243400
External references
- oeis: A152562