285311670613domain: NAppears in sequencesa(n) = Sum_{d|n} sigma_n(d).at n=10A321141a(n) = Sum_{d|n} sigma_d(d), where sigma_k(n) is the sum of the k-th powers of the divisors of n.at n=10A344434a(n) = Sum_{d|n} sigma_d(d)^(n/d).at n=10A359053