3875508domain: NAppears in sequencesNumbers n such that n | (sigma_4(n) + phi(n)^4).at n=16A055698Numbers n such that n | Sigma_8(n) + Phi(n)^8.at n=17A055702Numbers n such that n divides sigma_(2^k)(n), the sum of the 2^k powers of the divisors of n, for all k>1.at n=13A066292