LeetCode----Ugly Number

Ugly Number

Write a program to check whether a given number is an ugly number.

Ugly numbers are positive numbers whose prime factors only include 2, 3, 5. For example, 6, 8 are ugly while 14 is not ugly since it includes another prime factor 7.

Note that 1 is typically treated as an ugly number.

Credits:
Special thanks to @jianchao.li.fighter for adding this problem and creating all test cases.

分析：

简单题。

代码：

class Solution(object):
    def isUgly(self, num):
        """
        :type num: int
        :rtype: bool
        """
        if num <= 0:
            return False
        while num % 2 == 0:
            num = num / 2
        while num % 3 == 0:
            num = num / 3
        while num % 5 == 0:
            num = num / 5
        if num != 1:
            return False
        return True