Q: What are the prime factors of the number 40,401,837?

 A: 3, 7, 641299

Why are those the prime factors of the number 40,401,837?

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 40,401,837

40,401,837
Factor Arrows
313,467,279
Factor Arrows
34,489,093
Factor Arrows
7641,299

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:

3, 7, 641299

We can check our work by multiplying all of the prime factors together: 3 x 3 x 7 x 641,299 = 40,401,837

This can also be written as 32 x 71 x 641,2991 = 40,401,837

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


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