Q: What are the prime factors of the number 874,398?

 A: 2, 3, 7, 109, 191

Why are those the prime factors of the number 874,398?

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 874,398

874,398
Factor Arrows
2437,199
Factor Arrows
3145,733
Factor Arrows
720,819
Factor Arrows
109191

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, 191

We can check our work by multiplying all of the prime factors together: 2 x 3 x 7 x 109 x 191 = 874,398

This can also be written as 21 x 31 x 71 x 1091 x 1911 = 874,398

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


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