Q: What are the prime factors of the number 12,406,618?

 A: 2, 7, 37, 43, 557

Why are those the prime factors of the number 12,406,618?

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 12,406,618

12,406,618
Factor Arrows
26,203,309
Factor Arrows
7886,187
Factor Arrows
3723,951
Factor Arrows
43557

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, 7, 37, 43, 557

We can check our work by multiplying all of the prime factors together: 2 x 7 x 37 x 43 x 557 = 12,406,618

This can also be written as 21 x 71 x 371 x 431 x 5571 = 12,406,618

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


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