[질문] 1에서100까지의정수중100과서로소인것의개수

3,7,9,11,13,17,19,21,23,27,29,31,33,37,39,41,43,47,49,51,53,57,59, 61,63,67,69,71,73,77,79,81,83,87,89,91,93,97,99 이렇게 39개 존재 합니다