Q: What are the prime factors of the number 771,117,408?

 A: 2, 3, 97, 3067

Why are those the prime factors of the number 771,117,408?

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 771,117,408

771,117,408
Factor Arrows
2385,558,704
Factor Arrows
2192,779,352
Factor Arrows
296,389,676
Factor Arrows
248,194,838
Factor Arrows
224,097,419
Factor Arrows
38,032,473
Factor Arrows
32,677,491
Factor Arrows
3892,497
Factor Arrows
3297,499
Factor Arrows
973,067

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, 97, 3067

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 3 x 3 x 3 x 3 x 97 x 3,067 = 771,117,408

This can also be written as 25 x 34 x 971 x 3,0671 = 771,117,408

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


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