Q: What are the prime factors of the number 138,846,600?

 A: 2, 3, 5, 77137

Why are those the prime factors of the number 138,846,600?

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 138,846,600

138,846,600
Factor Arrows
269,423,300
Factor Arrows
234,711,650
Factor Arrows
217,355,825
Factor Arrows
35,785,275
Factor Arrows
31,928,425
Factor Arrows
5385,685
Factor Arrows
577,137

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, 3, 5, 77137

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 3 x 5 x 5 x 77,137 = 138,846,600

This can also be written as 23 x 32 x 52 x 77,1371 = 138,846,600

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


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