Q: What are the prime factors of the number 71,322,656?

 A: 2, 19, 117307

Why are those the prime factors of the number 71,322,656?

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 71,322,656

71,322,656
Factor Arrows
235,661,328
Factor Arrows
217,830,664
Factor Arrows
28,915,332
Factor Arrows
24,457,666
Factor Arrows
22,228,833
Factor Arrows
19117,307

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, 19, 117307

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 19 x 117,307 = 71,322,656

This can also be written as 25 x 191 x 117,3071 = 71,322,656

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


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