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