Q: What are the prime factors of the number 531,078,656?

 A: 2, 53, 19571

Why are those the prime factors of the number 531,078,656?

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 531,078,656

531,078,656
Factor Arrows
2265,539,328
Factor Arrows
2132,769,664
Factor Arrows
266,384,832
Factor Arrows
233,192,416
Factor Arrows
216,596,208
Factor Arrows
28,298,104
Factor Arrows
24,149,052
Factor Arrows
22,074,526
Factor Arrows
21,037,263
Factor Arrows
5319,571

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, 53, 19571

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 53 x 19,571 = 531,078,656

This can also be written as 29 x 531 x 19,5711 = 531,078,656

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


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