Q: What are the prime factors of the number 25,901,785?

 A: 5, 7, 13, 29, 151

Why are those the prime factors of the number 25,901,785?

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 25,901,785

25,901,785
Factor Arrows
55,180,357
Factor Arrows
7740,051
Factor Arrows
1356,927
Factor Arrows
134,379
Factor Arrows
29151

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:

5, 7, 13, 29, 151

We can check our work by multiplying all of the prime factors together: 5 x 7 x 13 x 13 x 29 x 151 = 25,901,785

This can also be written as 51 x 71 x 132 x 291 x 1511 = 25,901,785

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


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