15的约数有多少个,请问15的约数是什么?
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15的约数是:1,3,5,15。约数又称因数。整数a除以整数b(b≠0)除得的商正好是整数而没有余数,我们就说a能被b整除,或b能整除a。a称为b的倍数,b称为a的约数。
在大学之前,“约数”一词所指的一般只限于正约数。约数和倍数都是二元关系的概念,不能孤立地说某个整数是约数或倍数。一个整数的约数是有限的。同时,它可以在特定情况下成为公约数。
15的约数有:1、3、5、15
【英文介绍/For English】:
The divisors of 15 are: 1, 3, 5, 15. Divisors are also called factors. The quotient obtained by dividing an integer a by an integer b (b≠0) is exactly an integer without a remainder. We say that a is divisible by b, or that b is divisible by a. a is called a multiple of b, and b is called a divisor of a.
Before college, the term "approximation" generally referred to only positive divisors. Both divisors and multiples are concepts of binary relations, and it cannot be said that a certain integer is a divisor or a multiple in isolation. Divisors of an integer are finite. At the same time, it can be a common divisor under certain circumstances.