Tongron Y, Paikhlaew K. The Number of Integers Divisible by a^k Except a^(k+l) b. Sci Tech Asia [internet]. 2022 Sep. 28 [cited 2025 Dec. 16];27(3):132-6. available from: https://ph02.tci-thaijo.org/index.php/SciTechAsia/article/view/242455