Q: What are the prime factors of the number 68,800,640?

 A: 2, 5, 193, 557

Why are those the prime factors of the number 68,800,640?

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 68,800,640

68,800,640
Factor Arrows
234,400,320
Factor Arrows
217,200,160
Factor Arrows
28,600,080
Factor Arrows
24,300,040
Factor Arrows
22,150,020
Factor Arrows
21,075,010
Factor Arrows
2537,505
Factor Arrows
5107,501
Factor Arrows
193557

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, 193, 557

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 5 x 193 x 557 = 68,800,640

This can also be written as 27 x 51 x 1931 x 5571 = 68,800,640

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


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