Q263 Ugly Number
Q263 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.

Note that 1 is typically treated as an ugly number.

robertzm/algotest