Q: What are the prime factors of the number 782,578,424?

 A: 2, 79, 89, 13913

Why are those the prime factors of the number 782,578,424?

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 782,578,424

782,578,424
Factor Arrows
2391,289,212
Factor Arrows
2195,644,606
Factor Arrows
297,822,303
Factor Arrows
791,238,257
Factor Arrows
8913,913

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, 79, 89, 13913

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 79 x 89 x 13,913 = 782,578,424

This can also be written as 23 x 791 x 891 x 13,9131 = 782,578,424

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


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