Q: What are the prime factors of the number 131,215,626?

 A: 2, 3, 131, 229

Why are those the prime factors of the number 131,215,626?

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 131,215,626

131,215,626
Factor Arrows
265,607,813
Factor Arrows
321,869,271
Factor Arrows
37,289,757
Factor Arrows
32,429,919
Factor Arrows
3809,973
Factor Arrows
3269,991
Factor Arrows
389,997
Factor Arrows
329,999
Factor Arrows
131229

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, 131, 229

We can check our work by multiplying all of the prime factors together: 2 x 3 x 3 x 3 x 3 x 3 x 3 x 3 x 131 x 229 = 131,215,626

This can also be written as 21 x 37 x 1311 x 2291 = 131,215,626

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


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