55090232674domain: NAppears in sequencesa(n) = sigma_8(n), the sum of the 8th powers of the divisors of n.at n=21A013956Sum of n-th powers of divisors of 22.at n=8A241029Sum of the 8th powers of the squarefree divisors of n.at n=21A351271a(n) = n^8 * Product_{p|n, p prime} (1 + 1/p^8).at n=21A351303