Q: What are the prime factors of the number 34,789,905?

 A: 3, 5, 17, 31, 163

Why are those the prime factors of the number 34,789,905?

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 34,789,905

34,789,905
Factor Arrows
311,596,635
Factor Arrows
33,865,545
Factor Arrows
31,288,515
Factor Arrows
3429,505
Factor Arrows
585,901
Factor Arrows
175,053
Factor Arrows
31163

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:

3, 5, 17, 31, 163

We can check our work by multiplying all of the prime factors together: 3 x 3 x 3 x 3 x 5 x 17 x 31 x 163 = 34,789,905

This can also be written as 34 x 51 x 171 x 311 x 1631 = 34,789,905

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


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