The factors of 21 are 1, 3, 7 and 21. A factor is a number that can divide evenly into a given number. Because 21 can be divided by numbers other than itself and 1, it is called a composite number.
Know MoreEvery number has 1 and itself as a factor. Numbers that have no other factors are called prime numbers. To determine if 21 has other factors, a person would look to see if it is an even number. Because 21 is not, it cannot be divided by 2. Therefore, the individual would start by dividing by 3. The result is 7, which makes 3 and 7 both factors of 21. Next, 4, 5, and 6 would be tried. None of those can divide evenly into 21, so they are not factors.
Learn more about AlgebraThe factors of 126 are 1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 63 and 126. The prime factors of 126 are 2, 3 and 7.
Full Answer >The factors of 27 are one, three, nine and 27. The factors of a particular number are those numbers that divide evenly into it. One and the number itself are always factors of any given number.
Full Answer >The factors of six are one, two, three and six. Factors are the numbers that can be multiplied together to get the number being factored. Six multiplied by one equals six, and two multiplied by three equals six; no other positive integers multiplied together result in a product of six.
Full Answer >The factors of 31 are 31,1,-1, and -31. For any number, x, the factors are the set of numbers that can be multiplied by another number to equal x.
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