Q: What are the prime factors of the number 897,408?

 A: 2, 3, 19, 41

Why are those the prime factors of the number 897,408?

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 897,408

897,408
Factor Arrows
2448,704
Factor Arrows
2224,352
Factor Arrows
2112,176
Factor Arrows
256,088
Factor Arrows
228,044
Factor Arrows
214,022
Factor Arrows
27,011
Factor Arrows
32,337
Factor Arrows
3779
Factor Arrows
1941

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, 19, 41

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 19 x 41 = 897,408

This can also be written as 27 x 32 x 191 x 411 = 897,408

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


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