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该博客介绍了如何编写程序来检查一个给定的正整数是否为丑数，即其质因数仅包含2, 3, 5。文章提供了示例和注意事项，特别是强调输入虽可能为负数，但丑数仅限于正数。"
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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.
Example 1:
Input: 6 Output: true Explanation: 6 = 2 × 3
Example 2:
Input: 8 Output: true Explanation: 8 = 2 × 2 × 2
Example 3:
Input: 14 Output: false Explanation:14is not ugly since it includes another prime factor7.
Note:
1is typically treated as an ugly num
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