Every number has at least two factors, namely 1 and itself. The factors of 5 are 1 and 5. A number has no other factors except 1 and itself. This number is a prime number. For example, 7 is a prime number with only two factors, 1 and 7. The factor of a number can be positive, negative or zero.
For example, -4 is a factor of 4, and 4 can be divisible by -4. A number has multiple factors, which can be expressed by factorization. Factorization is a method to decompose a number into the product of several prime numbers. For example, 12 can be decomposed into 2×2×3, where both 2 and 3 are prime numbers.
App application
Factors are widely used in mathematics, such as integer theory, algebra, number theory and so on. Factors can also be used to find multiples of a number. For example, if the factors of a number are 2 and 3, then the multiples of this number are 2×3=6, 2×2×3= 12, 2×2×2×3=24, and so on.
Factors can also be used to judge the properties of a number. For example, if the number of factors of a number is odd, then the number is a complete square number. Factors can also be used to find the greatest common factor and the least common multiple. The greatest common factor refers to the greatest common factor of two numbers, and the least common multiple refers to the least common multiple of two numbers.
Correlation characteristic
Divisibility: If the integer A is divisible by the non-zero integer B, the quotient is an integer, and the remainder is zero, then A is divisible by B (or B is divisible by A) and recorded as ba. Prime number: a natural number with exactly two positive factors. Or defined as a number that cannot be divisible by other natural numbers except 1 and the integer itself.
Composite number: There are other positive factors besides 1 and itself. 1 has only a positive factor of 1, so it is neither a prime number nor a composite number. 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.