Q: What are the prime factors of the number 38,396,928?

 A: 2, 3, 29, 431

Why are those the prime factors of the number 38,396,928?

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 38,396,928

38,396,928
Factor Arrows
219,198,464
Factor Arrows
29,599,232
Factor Arrows
24,799,616
Factor Arrows
22,399,808
Factor Arrows
21,199,904
Factor Arrows
2599,952
Factor Arrows
2299,976
Factor Arrows
2149,988
Factor Arrows
274,994
Factor Arrows
237,497
Factor Arrows
312,499
Factor Arrows
29431

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, 29, 431

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 2 x 3 x 29 x 431 = 38,396,928

This can also be written as 210 x 31 x 291 x 4311 = 38,396,928

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


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