Q: What are the prime factors of the number 23,420,672?

 A: 2, 11, 8317

Why are those the prime factors of the number 23,420,672?

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 23,420,672

23,420,672
Factor Arrows
211,710,336
Factor Arrows
25,855,168
Factor Arrows
22,927,584
Factor Arrows
21,463,792
Factor Arrows
2731,896
Factor Arrows
2365,948
Factor Arrows
2182,974
Factor Arrows
291,487
Factor Arrows
118,317

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, 11, 8317

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 11 x 8,317 = 23,420,672

This can also be written as 28 x 111 x 8,3171 = 23,420,672

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


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