263 丑数

class Solution {
public:
    bool isUgly(int n) {
        if(n<=0)
        {
            return false;
        }
        vector<int>factors={2,3,5};
        for(int factor:factors)
        {
            while(n % factor==0)
            {
                n /= factor;
            }         
        }
        return n==1;
    }
};