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The factors of 20 are the numbers, which produce the result as 20 when a pair of factors are multiplied together. These factors are 1,2,4,5,10 and 20.

Step-by-step explanation:

Learn the following steps to find factors of a number 20.

First, write the number 20

Find the two numbers, which gives the result as 20 under the multiplication, say 2 and 10, such as 2 × 10 = 20.

We know that 2 is a prime number which has only two factors, i.e., 1 and the number itself (1 and 2). So, we cannot further factorize it.2 = 2 × 1

But 10 is a composite number but not a prime number. So it can be further factorized.

10 = 2 × 5 × 1

Therefore, the factorization of 20 is written as, 20 = 2 × 2 × 5 × 1

Finally, write down all the unique numbers which we can obtain from 20 = 2 × 2 × 5 × 1

Factors of 20

1, 2, 4, 5, 10, and 20

Prime Factors of 20

The number 20 is a composite number and it has prime factors. Now let us know how to find the prime factors.

The first step is to divide the number 20 with the smallest prime factor, say 2.

20 ÷ 2 = 10

Again, divide 10 by 2

10÷ 2 = 5

Now, if we divide 5 by 2 we will get a fractional number, which cannot be a factor.

So, now proceed with the next prime numbers, i.e. 5

5 ÷ 5 = 1

We have received 1 at the end in the division process and so that we cannot proceed further. So, the prime factors are written as 2 × 2 × 5 or × 5, where 2 and 5 are the prime numbers.