Q: What are the prime factors of the number 131,031,450?

 A: 2, 3, 5, 11, 103, 257

Why are those the prime factors of the number 131,031,450?

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 131,031,450

131,031,450
Factor Arrows
265,515,725
Factor Arrows
321,838,575
Factor Arrows
37,279,525
Factor Arrows
51,455,905
Factor Arrows
5291,181
Factor Arrows
1126,471
Factor Arrows
103257

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, 103, 257

We can check our work by multiplying all of the prime factors together: 2 x 3 x 3 x 5 x 5 x 11 x 103 x 257 = 131,031,450

This can also be written as 21 x 32 x 52 x 111 x 1031 x 2571 = 131,031,450

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


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