Q: What are the prime factors of the number 39,903,948?

 A: 2, 3, 7, 52783

Why are those the prime factors of the number 39,903,948?

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 39,903,948

39,903,948
Factor Arrows
219,951,974
Factor Arrows
29,975,987
Factor Arrows
33,325,329
Factor Arrows
31,108,443
Factor Arrows
3369,481
Factor Arrows
752,783

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, 52783

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 3 x 3 x 7 x 52,783 = 39,903,948

This can also be written as 22 x 33 x 71 x 52,7831 = 39,903,948

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


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