Q: What are the prime factors of the number 76,901,920?

 A: 2, 5, 523, 919

Why are those the prime factors of the number 76,901,920?

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 76,901,920

76,901,920
Factor Arrows
238,450,960
Factor Arrows
219,225,480
Factor Arrows
29,612,740
Factor Arrows
24,806,370
Factor Arrows
22,403,185
Factor Arrows
5480,637
Factor Arrows
523919

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, 5, 523, 919

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 5 x 523 x 919 = 76,901,920

This can also be written as 25 x 51 x 5231 x 9191 = 76,901,920

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


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