Q: What are the prime factors of the number 553,434,816?

 A: 2, 3, 11, 31, 79, 107

Why are those the prime factors of the number 553,434,816?

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 553,434,816

553,434,816
Factor Arrows
2276,717,408
Factor Arrows
2138,358,704
Factor Arrows
269,179,352
Factor Arrows
234,589,676
Factor Arrows
217,294,838
Factor Arrows
28,647,419
Factor Arrows
32,882,473
Factor Arrows
11262,043
Factor Arrows
318,453
Factor Arrows
79107

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, 11, 31, 79, 107

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 2 x 3 x 11 x 31 x 79 x 107 = 553,434,816

This can also be written as 26 x 31 x 111 x 311 x 791 x 1071 = 553,434,816

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


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