Q: What are the prime factors of the number 85,308,624?

 A: 2, 3, 79, 7499

Why are those the prime factors of the number 85,308,624?

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 85,308,624

85,308,624
Factor Arrows
242,654,312
Factor Arrows
221,327,156
Factor Arrows
210,663,578
Factor Arrows
25,331,789
Factor Arrows
31,777,263
Factor Arrows
3592,421
Factor Arrows
797,499

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, 79, 7499

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 3 x 79 x 7,499 = 85,308,624

This can also be written as 24 x 32 x 791 x 7,4991 = 85,308,624

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


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