Given an integer n
, return true
if n
is an ugly number.
Ugly number is a positive number whose prime factors only include 2
, 3
, and/or 5
.
Example 1:
Input: n = 6
Output: true
Explanation: 6 = 2 × 3
Example 2:
Input: n = 8
Output: true
Explanation: 8 = 2 × 2 × 2
Example 3:
Input: n = 14
Output: false
Explanation: 14 is not ugly since it includes another prime factor 7.
Example 4:
Input: n = 1
Output: true
Explanation: 1 is typically treated as an ugly number.
Constraints:
- -231 <= n <= 231 - 1