Q: What are the prime factors of the number 258,104,421?

 A: 3, 17, 73, 7703

Why are those the prime factors of the number 258,104,421?

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 258,104,421

258,104,421
Factor Arrows
386,034,807
Factor Arrows
328,678,269
Factor Arrows
39,559,423
Factor Arrows
17562,319
Factor Arrows
737,703

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:

3, 17, 73, 7703

We can check our work by multiplying all of the prime factors together: 3 x 3 x 3 x 17 x 73 x 7,703 = 258,104,421

This can also be written as 33 x 171 x 731 x 7,7031 = 258,104,421

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


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