Q: What are the prime factors of the number 38,915,424?

 A: 2, 3, 73, 617

Why are those the prime factors of the number 38,915,424?

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 38,915,424

38,915,424
Factor Arrows
219,457,712
Factor Arrows
29,728,856
Factor Arrows
24,864,428
Factor Arrows
22,432,214
Factor Arrows
21,216,107
Factor Arrows
3405,369
Factor Arrows
3135,123
Factor Arrows
345,041
Factor Arrows
73617

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, 73, 617

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 3 x 3 x 3 x 73 x 617 = 38,915,424

This can also be written as 25 x 33 x 731 x 6171 = 38,915,424

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


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