Q: What are the prime factors of the number 626,377,320?

 A: 2, 3, 5, 31, 53, 353

Why are those the prime factors of the number 626,377,320?

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 626,377,320

626,377,320
Factor Arrows
2313,188,660
Factor Arrows
2156,594,330
Factor Arrows
278,297,165
Factor Arrows
326,099,055
Factor Arrows
38,699,685
Factor Arrows
32,899,895
Factor Arrows
5579,979
Factor Arrows
3118,709
Factor Arrows
53353

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, 5, 31, 53, 353

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 3 x 3 x 5 x 31 x 53 x 353 = 626,377,320

This can also be written as 23 x 33 x 51 x 311 x 531 x 3531 = 626,377,320

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


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