Divisor-Count on Jasperhttps://jasper-aa64.github.io/tags/divisor-count/Recent content in Divisor-Count on JasperHugoen-usTue, 28 Apr 2026 00:00:00 +0800Number Theory #2-ex: Möbius Practice — LCM Sums, Divisor-Count, Omega Numbershttps://jasper-aa64.github.io/posts/number-theory-2-ex-mobius-practice/Tue, 28 Apr 2026 00:00:00 +0800https://jasper-aa64.github.io/posts/number-theory-2-ex-mobius-practice/Practice problems for Möbius inversion: LCMSUM, two-variable lcm sum (O(n^3/4)), FSF’s game with offline difference, divisor-count sum d(ij), Omega Numbers with Dirichlet suffix sum.