Q: What are the prime factors of the number 138,036,288?

 A: 2, 3, 13, 29, 1907

Why are those the prime factors of the number 138,036,288?

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 138,036,288

138,036,288
Factor Arrows
269,018,144
Factor Arrows
234,509,072
Factor Arrows
217,254,536
Factor Arrows
28,627,268
Factor Arrows
24,313,634
Factor Arrows
22,156,817
Factor Arrows
3718,939
Factor Arrows
1355,303
Factor Arrows
291,907

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, 13, 29, 1907

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 3 x 13 x 29 x 1,907 = 138,036,288

This can also be written as 26 x 31 x 131 x 291 x 1,9071 = 138,036,288

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


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