[질문] 1부터50까지의자연수중약수가4개인자연수를구하는방법

2 x 3, 2 x 5, 3 x 5, 2 x 7, 3 x 7, 5 x 7, 2 x 11, 3 x 11, 등입니다. 6,10,15,14,21,35,22,33 등