Q: What are the prime factors of the number 25,871,670?

 A: 2, 3, 5, 11, 31, 281

Why are those the prime factors of the number 25,871,670?

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 25,871,670

25,871,670
Factor Arrows
212,935,835
Factor Arrows
34,311,945
Factor Arrows
31,437,315
Factor Arrows
3479,105
Factor Arrows
595,821
Factor Arrows
118,711
Factor Arrows
31281

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, 11, 31, 281

We can check our work by multiplying all of the prime factors together: 2 x 3 x 3 x 3 x 5 x 11 x 31 x 281 = 25,871,670

This can also be written as 21 x 33 x 51 x 111 x 311 x 2811 = 25,871,670

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


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