Q: What are the prime factors of the number 1,387,488?

 A: 2, 3, 97, 149

Why are those the prime factors of the number 1,387,488?

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 1,387,488

1,387,488
Factor Arrows
2693,744
Factor Arrows
2346,872
Factor Arrows
2173,436
Factor Arrows
286,718
Factor Arrows
243,359
Factor Arrows
314,453
Factor Arrows
97149

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, 97, 149

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 3 x 97 x 149 = 1,387,488

This can also be written as 25 x 31 x 971 x 1491 = 1,387,488

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


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