# Ugly Number

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. One is also considered an ugly number.

Example

```
num factors result
1 1 true
8 2*2*2 true
14 2*7 false
```