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