Q: What are the prime factors of the number 20,642,304?

 A: 2, 3, 89, 151

Why are those the prime factors of the number 20,642,304?

Prime factors are the prime numbers that can be multipled together to equal the original number. You find the factors by dividing by prime numbers. It is best shown by creating a Factor Tree.

Factor Tree for the number 20,642,304

20,642,304
Factor Arrows
210,321,152
Factor Arrows
25,160,576
Factor Arrows
22,580,288
Factor Arrows
21,290,144
Factor Arrows
2645,072
Factor Arrows
2322,536
Factor Arrows
2161,268
Factor Arrows
280,634
Factor Arrows
240,317
Factor Arrows
313,439
Factor Arrows
89151

The numbers in bold above are the prime factors. If there are multiples, you only count them one time. This leads us to our prime factors of:

2, 3, 89, 151

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 3 x 89 x 151 = 20,642,304

This can also be written as 29 x 31 x 891 x 1511 = 20,642,304

If you would like to know more, or need additional explanation, please review our prime factorization explanation.


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