Q: What are the prime factors of the number 123,352,544?

 A: 2, 7, 17, 29, 1117

Why are those the prime factors of the number 123,352,544?

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 123,352,544

123,352,544
Factor Arrows
261,676,272
Factor Arrows
230,838,136
Factor Arrows
215,419,068
Factor Arrows
27,709,534
Factor Arrows
23,854,767
Factor Arrows
7550,681
Factor Arrows
1732,393
Factor Arrows
291,117

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, 17, 29, 1117

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 7 x 17 x 29 x 1,117 = 123,352,544

This can also be written as 25 x 71 x 171 x 291 x 1,1171 = 123,352,544

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


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