Divisor moments of polynomials in Fourier coefficients of modular forms

We study higher moments of the divisor function evaluated at polynomial expressions in the Fourier coefficients of a non-CM newform. The logarithmic exponent appearing in our estimates depends only on the number of irreducible factors of the polynomial and remains unchanged under a Sato–Tate restriction. The proof combines an effective Chebotarev theorem, or an effective Chebotarev–Sato–Tate theorem, with the arithmetic of joint cycle types and a mean value estimation for multivariable multiplicative functions with Frobenian support.