Q: What are the prime factors of the number 5,430,656?

 A: 2, 7, 11, 19, 29

Why are those the prime factors of the number 5,430,656?

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 5,430,656

5,430,656
Factor Arrows
22,715,328
Factor Arrows
21,357,664
Factor Arrows
2678,832
Factor Arrows
2339,416
Factor Arrows
2169,708
Factor Arrows
284,854
Factor Arrows
242,427
Factor Arrows
76,061
Factor Arrows
11551
Factor Arrows
1929

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, 7, 11, 19, 29

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 7 x 11 x 19 x 29 = 5,430,656

This can also be written as 27 x 71 x 111 x 191 x 291 = 5,430,656

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


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