Park, Yoon Kyung Evaluation of the convolution sums \(\Sigma_{al+bm=n}\,l \sigma(l)\sigma(m)\) with \(ab\leq 9\). (English) Zbl 1430.11007 Open Math. 15, 1389-1399 (2017). MSC: 11A25 11F11 11F20 PDFBibTeX XMLCite \textit{Y. K. Park}, Open Math. 15, 1389--1399 (2017; Zbl 1430.11007) Full Text: DOI
Lee, Joohee; Park, Yoon Kyung Evaluation of the convolution sums \(\displaystyle\sum_{a_1m_1+a_2m_2+a_3m_3+a_4m_4=n}\sigma(m_1)\sigma(m_2)\sigma(m_3)\sigma(m_4)\) with \(\text{lcm}(a_1,a_2,a_3,a_4)\le 4\). (English) Zbl 1411.11007 Int. J. Number Theory 13, No. 8, 2155-2173 (2017). MSC: 11A25 11F11 11E25 11F20 PDFBibTeX XMLCite \textit{J. Lee} and \textit{Y. K. Park}, Int. J. Number Theory 13, No. 8, 2155--2173 (2017; Zbl 1411.11007) Full Text: DOI