Q: What are the prime factors of the number 432,320?

 A: 2, 5, 7, 193

Why are those the prime factors of the number 432,320?

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 432,320

432,320
Factor Arrows
2216,160
Factor Arrows
2108,080
Factor Arrows
254,040
Factor Arrows
227,020
Factor Arrows
213,510
Factor Arrows
26,755
Factor Arrows
51,351
Factor Arrows
7193

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, 5, 7, 193

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 5 x 7 x 193 = 432,320

This can also be written as 26 x 51 x 71 x 1931 = 432,320

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


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