Ugly Number——Math

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.

class Solution(object):
    def isUgly(self, num):
        """
        :type num: int
        :rtype: bool
        """
        while num>=2 and num%2==0:
        	num/=2
        while num>=3 and num%3==0:
        	num/=3
        while num>=5 and num%5==0:
        	num/=5
        return num==1