Q: What are the prime factors of the number 783,031,872?

 A: 2, 3, 7, 23, 73, 347

Why are those the prime factors of the number 783,031,872?

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 783,031,872

783,031,872
Factor Arrows
2391,515,936
Factor Arrows
2195,757,968
Factor Arrows
297,878,984
Factor Arrows
248,939,492
Factor Arrows
224,469,746
Factor Arrows
212,234,873
Factor Arrows
34,078,291
Factor Arrows
7582,613
Factor Arrows
2325,331
Factor Arrows
73347

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, 7, 23, 73, 347

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 3 x 7 x 23 x 73 x 347 = 783,031,872

This can also be written as 26 x 31 x 71 x 231 x 731 x 3471 = 783,031,872

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


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