Q: What are the prime factors of the number 115,431,318?

 A: 2, 3, 41, 1931

Why are those the prime factors of the number 115,431,318?

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 115,431,318

115,431,318
Factor Arrows
257,715,659
Factor Arrows
319,238,553
Factor Arrows
36,412,851
Factor Arrows
32,137,617
Factor Arrows
3712,539
Factor Arrows
3237,513
Factor Arrows
379,171
Factor Arrows
411,931

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, 41, 1931

We can check our work by multiplying all of the prime factors together: 2 x 3 x 3 x 3 x 3 x 3 x 3 x 41 x 1,931 = 115,431,318

This can also be written as 21 x 36 x 411 x 1,9311 = 115,431,318

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


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