Q: What are the prime factors of the number 20,312,100?

 A: 2, 3, 5, 7523

Why are those the prime factors of the number 20,312,100?

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 20,312,100

20,312,100
Factor Arrows
210,156,050
Factor Arrows
25,078,025
Factor Arrows
31,692,675
Factor Arrows
3564,225
Factor Arrows
3188,075
Factor Arrows
537,615
Factor Arrows
57,523

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, 7523

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 3 x 3 x 5 x 5 x 7,523 = 20,312,100

This can also be written as 22 x 33 x 52 x 7,5231 = 20,312,100

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


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