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Sum of higher divisor function with prime summands

Yuchen Ding, Guang-Liang Zhou (2023)

Czechoslovak Mathematical Journal

Let l 2 be an integer. Recently, Hu and Lü offered the asymptotic formula for the sum of the higher divisor function 1 n 1 , n 2 , ... , n l x 1 / 2 τ k ( n 1 2 + n 2 2 + + n l 2 ) , where τ k ( n ) represents the k th divisor function. We give the Goldbach-type analogy of their result. That is to say, we investigate the asymptotic behavior of the sum 1 p 1 , p 2 , ... , p l x τ k ( p 1 + p 2 + + p l ) , where p 1 , p 2 , , p l are prime variables.

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