Q: What are the prime factors of the number 12,430,440?

 A: 2, 3, 5, 11, 43, 73

Why are those the prime factors of the number 12,430,440?

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 12,430,440

12,430,440
Factor Arrows
26,215,220
Factor Arrows
23,107,610
Factor Arrows
21,553,805
Factor Arrows
3517,935
Factor Arrows
3172,645
Factor Arrows
534,529
Factor Arrows
113,139
Factor Arrows
4373

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, 43, 73

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 3 x 5 x 11 x 43 x 73 = 12,430,440

This can also be written as 23 x 32 x 51 x 111 x 431 x 731 = 12,430,440

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


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