Q: What are the prime factors of the number 878,976?

 A: 2, 3, 7, 109

Why are those the prime factors of the number 878,976?

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 878,976

878,976
Factor Arrows
2439,488
Factor Arrows
2219,744
Factor Arrows
2109,872
Factor Arrows
254,936
Factor Arrows
227,468
Factor Arrows
213,734
Factor Arrows
26,867
Factor Arrows
32,289
Factor Arrows
3763
Factor Arrows
7109

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, 109

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 3 x 3 x 7 x 109 = 878,976

This can also be written as 27 x 32 x 71 x 1091 = 878,976

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


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