Q: What are the prime factors of the number 26,457,678?

 A: 2, 3, 13, 17, 739

Why are those the prime factors of the number 26,457,678?

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 26,457,678

26,457,678
Factor Arrows
213,228,839
Factor Arrows
34,409,613
Factor Arrows
31,469,871
Factor Arrows
3489,957
Factor Arrows
3163,319
Factor Arrows
1312,563
Factor Arrows
17739

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, 13, 17, 739

We can check our work by multiplying all of the prime factors together: 2 x 3 x 3 x 3 x 3 x 13 x 17 x 739 = 26,457,678

This can also be written as 21 x 34 x 131 x 171 x 7391 = 26,457,678

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


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