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For any integer $l\geq 1$, let $p_1, p_2, \ldots, p_{l+2}$ be distinct primenumbers $\geq 5.$ For all real numbers $X>1,$ we let $N_{3,l}(X)$ denote thenumber of real quadratic fields $K$ whose absolute discriminant $d_K\leq X$ and$d_K$ is divisible by $(p_1\ldots p_{l+2})$ together with the class number$h_K$ of $K$ divisible by $2^{l}\cdot 3.$ Then, in this short note, byfollowing the method in \cite{Byeonkoh}, we prove that $N_{3,l}(X) \ggX^\frac{7}{8}$ for all large enough $X$'s.

A short note on the divisibility of class numbers of real quadratic fields