Q: What are the prime factors of the number 137,866,176?

 A: 2, 3, 7, 31, 1103

Why are those the prime factors of the number 137,866,176?

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 137,866,176

137,866,176
Factor Arrows
268,933,088
Factor Arrows
234,466,544
Factor Arrows
217,233,272
Factor Arrows
28,616,636
Factor Arrows
24,308,318
Factor Arrows
22,154,159
Factor Arrows
3718,053
Factor Arrows
3239,351
Factor Arrows
734,193
Factor Arrows
311,103

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, 7, 31, 1103

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 3 x 7 x 31 x 1,103 = 137,866,176

This can also be written as 26 x 32 x 71 x 311 x 1,1031 = 137,866,176

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


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