Leetcode: Ugly Number

Question

rite 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.

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Solution

class Solution(object):
    def isUgly(self, num):
        """ :type num: int :rtype: bool """

        if num<=0:
            return False

        while num%2==0:
            num /= 2

        while num%3==0:
            num /= 3

        while num%5==0:
            num /= 5

        return num==1