Q: What are the prime factors of the number 39,171,680?

 A: 2, 5, 47, 5209

Why are those the prime factors of the number 39,171,680?

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 39,171,680

39,171,680
Factor Arrows
219,585,840
Factor Arrows
29,792,920
Factor Arrows
24,896,460
Factor Arrows
22,448,230
Factor Arrows
21,224,115
Factor Arrows
5244,823
Factor Arrows
475,209

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, 47, 5209

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 5 x 47 x 5,209 = 39,171,680

This can also be written as 25 x 51 x 471 x 5,2091 = 39,171,680

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


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