名词
中文翻译：Unknown
同义词：
['factor', 'factorial']
例句：
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1. The number of factors in the equation is 3.
方程中的因数有3个。
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2. The factorial of a number is the product of all positive integers up to that number.
一个数的阶乘是所有小于该数的正整数的积。
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3. In mathematics, the factorial of a number is often used to represent the product ofall positive integers less than or equal to that number.
在数学中，一个数的阶乘通常用来表示所有小于或等于该数的正整数的积。