Definition of mathematical factors in primary schools: If a*b=c(a, B and C are all integers), then we call A and B the factors of C. It should be noted that this relationship only holds if the dividend, divisor and quotient are integers and the remainder is zero.
In fact, factors are generally defined as integers: let a be an integer and b be a non-zero integer. If there is an integer Q that makes A=QB, then B is a factor of A, denoted as B | A ... but some authors do not require B≠0.
Extended data:
Two nonzero natural numbers whose common factor is only 1 are called prime numbers.
2. The number of positive factors of 1 nonzero natural number is limited, of which the smallest is1and the largest is itself. The multiples of nonzero natural numbers are infinite.
3. All nonzero integers are factors of 0. (still controversial)
4 and 2 are the smallest prime numbers.
5 and 4 are the smallest composite numbers.
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