Q: What are the prime factors of the number 258,240?

 A: 2, 3, 5, 269

Why are those the prime factors of the number 258,240?

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 258,240

258,240
Factor Arrows
2129,120
Factor Arrows
264,560
Factor Arrows
232,280
Factor Arrows
216,140
Factor Arrows
28,070
Factor Arrows
24,035
Factor Arrows
31,345
Factor Arrows
5269

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, 269

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 3 x 5 x 269 = 258,240

This can also be written as 26 x 31 x 51 x 2691 = 258,240

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


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