Oh, it's such a perfect number. I want to count it with you.
All part of Robin Wilson's 18-part series on the equations that add up to mathematics.
PS: we would also like to apologise for a slip of the tongue at 1.17 when Robin says 2 to the n is prime when he obviously means 2 to the n-1. However, the graphic is correct. Admin has been sacked (by Admin).