Q: What are the prime factors of the number 57,760,000?

 A: 2, 5, 19

Why are those the prime factors of the number 57,760,000?

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 57,760,000

57,760,000
Factor Arrows
228,880,000
Factor Arrows
214,440,000
Factor Arrows
27,220,000
Factor Arrows
23,610,000
Factor Arrows
21,805,000
Factor Arrows
2902,500
Factor Arrows
2451,250
Factor Arrows
2225,625
Factor Arrows
545,125
Factor Arrows
59,025
Factor Arrows
51,805
Factor Arrows
5361
Factor Arrows
1919

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, 19

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 5 x 5 x 5 x 5 x 19 x 19 = 57,760,000

This can also be written as 28 x 54 x 192 = 57,760,000

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


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