A prime number is a natural number and has no other factors except 1 and itself.
A composite number is a natural number that can be divisible by other numbers (except 0) except 1 and itself.
A prime factor is a prime number divisible by a given positive integer.
In primary school mathematics, two positive integers are multiplied, so both numbers are called factors of product, or divisors.
Extended data:
Related properties of factors
1, divisible: If the integer A is divisible by the non-zero integer B, the quotient is an integer and the remainder is zero, we say that A is divisible by B (or B is divisible by A) and record it as B | A..
2. Prime number (prime number): a natural number with exactly two positive factors. (or defined as a number that is not divisible by other natural numbers except 1 and the integer itself among natural numbers greater than 1).
3. Composite number: There are other positive factors besides 1 and itself.
4. 1 has only a positive factor of 1, so it is neither a prime number nor a composite number.
5. If A is a factor of B and A is a prime number, then A is a prime factor of B ... For example, 2, 3 and 5 are all prime factors of 30. 6 is not a prime number, so it doesn't count. 7 is not a factor of 30, so it is not a prime factor.
6. Two nonzero natural numbers whose common factor is only 1 are called prime numbers.
7. 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.
8. All nonzero integers are factors of 0. (still controversial)
9 and 2 are the smallest prime numbers.
10,4 is the smallest composite number.
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