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# What are the factors of 40?

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Eight numbers are factors of 40, including 1, 2 and 4. Other factors of 40 are 5, 8, 10, 20 and 40.

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The factors of a number are those that divide evenly into the number in question. To factor a number, it is expressed as a product of smaller numbers which is referred to as factorization. For example, factoring the number 12 would result in 3 x 4, but it can be further factored as 12 = 2 x 2 x 3. If a number can not be factored any further, it is known as a prime number. The greatest common factor is the greatest number that two numbers have in common. For instance, the greatest common factor of 16 and 12 is 4 because it is the largest number that can be evenly divided into both numbers.

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## Related Questions

• A:

The factors of the number 8 are 1, 2, 4 and 8. Since the number is divisible by more than 1 and itself, it is not a prime number.

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• A:

The factors of 44 are 1, 2, 4, 11, 22 and 44. These are the numbers that, when multiplied together, give a product of 44—1 x 44 = 44, 2 x 22 = 44, and 4 x 11 = 44.

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• A:

The factors of 84 are (-1), (-2), (-3), (-4), (-6), (-7), (-12), (-14), (-21), (-28), (-42), (-84), 1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42 and 84. To find the factors of a number, mathematicians find all of the possible number combinations that can be multiplied to give the number.