名词
中文翻译：因数的
同义词：
['factorial', 'factorial', 'factoriality']
例句：
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1.The number 5 is a factorial number.
5是一个因数。
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2. The factorial of a number is the product of all positive integers less than or equal to that number.
一个数的阶乘是所有小于或等于该数的正整数的积。
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3.In mathematics, factorials are used to calculate the total number of ways to perform a task, such as counting the number of ways to arrange n objects on a line.
在数学中，因数用于计算完成任务的总方法数，例如计算将n个物体排列在线上的总方法数。