The factors of a number are those numbers that divide the number evenly leaving a remainder of 0. For example, 6 can be divided by 1 and 2 with a remainder of 0, so 2 and 3 are the factors of 6. Generally, every even number has two negative and three positive factors. The factors of a number can be found using divisibility rules and division facts. The factors of a number can also be determined by performing factorization, which is the process of finding all the prime numbers that divide a number. The factors of a number can also include composite numbers, which are those numbers other than the number itself that divide the number evenly.

#### Tips for Factoring

The smaller the number, the fewer factors it will have. This means that it will take less time to find the factors of a small number than a larger one. Generally, it is easiest to start with the prime factors. This is because prime numbers are the only numbers that can divide a number evenly without a remainder. Then, the remaining numbers can be checked to see if they are factors of the number.

To find the factors of a number, start by checking for common factors. A common factor is a number that divides the number being tested evenly into itself. For example, 6 and 18 have a common factor of 2. Once you have found the common factors, you can begin to find the prime factors.