Q: What are the prime factors of the number 20,662,516?

 A: 2, 7, 47, 2243

Why are those the prime factors of the number 20,662,516?

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 20,662,516

20,662,516
Factor Arrows
210,331,258
Factor Arrows
25,165,629
Factor Arrows
7737,947
Factor Arrows
7105,421
Factor Arrows
472,243

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, 47, 2243

We can check our work by multiplying all of the prime factors together: 2 x 2 x 7 x 7 x 47 x 2,243 = 20,662,516

This can also be written as 22 x 72 x 471 x 2,2431 = 20,662,516

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


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