Q: What are the prime factors of the number 20,012,643?

 A: 3, 7, 19, 5573

Why are those the prime factors of the number 20,012,643?

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 20,012,643

20,012,643
Factor Arrows
36,670,881
Factor Arrows
32,223,627
Factor Arrows
3741,209
Factor Arrows
7105,887
Factor Arrows
195,573

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, 19, 5573

We can check our work by multiplying all of the prime factors together: 3 x 3 x 3 x 7 x 19 x 5,573 = 20,012,643

This can also be written as 33 x 71 x 191 x 5,5731 = 20,012,643

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


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