Q: What are the prime factors of the number 172,122,800?

 A: 2, 5, 23, 53, 353

Why are those the prime factors of the number 172,122,800?

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 172,122,800

172,122,800
Factor Arrows
286,061,400
Factor Arrows
243,030,700
Factor Arrows
221,515,350
Factor Arrows
210,757,675
Factor Arrows
52,151,535
Factor Arrows
5430,307
Factor Arrows
2318,709
Factor Arrows
53353

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, 5, 23, 53, 353

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 5 x 5 x 23 x 53 x 353 = 172,122,800

This can also be written as 24 x 52 x 231 x 531 x 3531 = 172,122,800

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


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