Q: What are the prime factors of the number 641,184?

 A: 2, 3, 6679

Why are those the prime factors of the number 641,184?

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 641,184

641,184
Factor Arrows
2320,592
Factor Arrows
2160,296
Factor Arrows
280,148
Factor Arrows
240,074
Factor Arrows
220,037
Factor Arrows
36,679

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, 6679

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 6,679 = 641,184

This can also be written as 25 x 31 x 6,6791 = 641,184

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


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