Q: What are the prime factors of the number 85,482,378?

 A: 2, 3, 47, 103, 109

Why are those the prime factors of the number 85,482,378?

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 85,482,378

85,482,378
Factor Arrows
242,741,189
Factor Arrows
314,247,063
Factor Arrows
34,749,021
Factor Arrows
31,583,007
Factor Arrows
3527,669
Factor Arrows
4711,227
Factor Arrows
103109

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, 47, 103, 109

We can check our work by multiplying all of the prime factors together: 2 x 3 x 3 x 3 x 3 x 47 x 103 x 109 = 85,482,378

This can also be written as 21 x 34 x 471 x 1031 x 1091 = 85,482,378

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


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