Q: What are the prime factors of the number 258,432?

 A: 2, 3, 673

Why are those the prime factors of the number 258,432?

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 258,432

258,432
Factor Arrows
2129,216
Factor Arrows
264,608
Factor Arrows
232,304
Factor Arrows
216,152
Factor Arrows
28,076
Factor Arrows
24,038
Factor Arrows
22,019
Factor Arrows
3673

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, 673

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 673 = 258,432

This can also be written as 27 x 31 x 6731 = 258,432

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


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