Q: What are the prime factors of the number 220,251,312?

 A: 2, 3, 23, 821

Why are those the prime factors of the number 220,251,312?

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 220,251,312

220,251,312
Factor Arrows
2110,125,656
Factor Arrows
255,062,828
Factor Arrows
227,531,414
Factor Arrows
213,765,707
Factor Arrows
34,588,569
Factor Arrows
31,529,523
Factor Arrows
3509,841
Factor Arrows
3169,947
Factor Arrows
356,649
Factor Arrows
318,883
Factor Arrows
23821

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, 23, 821

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 3 x 3 x 3 x 3 x 3 x 23 x 821 = 220,251,312

This can also be written as 24 x 36 x 231 x 8211 = 220,251,312

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


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