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Sums of logarithmic weights involving r-full numbers

  • Isao Kiuchi

摘要

Let (nq) denote the greatest common divisor of positive integers n and q, and let \(f_{r}\) f r denote the characteristic function of r-full numbers. We consider several asymptotic formulas for sums of the modified square-full ( \(r=2\) r = 2 ) and cube-full numbers ( \(r=3\) r = 3 ), which is \(\sum _{n\le y}\sum _{q\le x}\sum _{d|(n,q)}df_{r}\left( \frac{q}{d}\right) \log \frac{x}{q}\) n y q x d | ( n , q ) d f r q d log x q with any positive real numbers x and y. Moreover, we derive the asymptotic formula of the above with \(r=2\) r = 2 under the Riemann Hypothesis.