Q: What are the prime factors of the number 779,820?

 A: 2, 3, 5, 41, 317

Why are those the prime factors of the number 779,820?

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 779,820

779,820
Factor Arrows
2389,910
Factor Arrows
2194,955
Factor Arrows
364,985
Factor Arrows
512,997
Factor Arrows
41317

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, 5, 41, 317

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 5 x 41 x 317 = 779,820

This can also be written as 22 x 31 x 51 x 411 x 3171 = 779,820

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


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