Q: What are the prime factors of the number 325,421,250?

 A: 2, 3, 5, 7, 11, 23

Why are those the prime factors of the number 325,421,250?

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 325,421,250

325,421,250
Factor Arrows
2162,710,625
Factor Arrows
354,236,875
Factor Arrows
510,847,375
Factor Arrows
52,169,475
Factor Arrows
5433,895
Factor Arrows
586,779
Factor Arrows
712,397
Factor Arrows
71,771
Factor Arrows
7253
Factor Arrows
1123

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, 5, 7, 11, 23

We can check our work by multiplying all of the prime factors together: 2 x 3 x 5 x 5 x 5 x 5 x 7 x 7 x 7 x 11 x 23 = 325,421,250

This can also be written as 21 x 31 x 54 x 73 x 111 x 231 = 325,421,250

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


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