Sum of divisors of colossally abundant numbers.

Terms

a(0) =3a(1) =12a(2) =28a(3) =168a(4) =360a(5) =1170a(6) =9360a(7) =19344a(8) =232128a(9) =3249792a(10) =6604416a(11) =20321280a(12) =104993280a(13) =1889879040a(14) =37797580800a(15) =907141939200