Q: What are the prime factors of the number 641,984?

 A: 2, 7, 1433

Why are those the prime factors of the number 641,984?

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 641,984

641,984
Factor Arrows
2320,992
Factor Arrows
2160,496
Factor Arrows
280,248
Factor Arrows
240,124
Factor Arrows
220,062
Factor Arrows
210,031
Factor Arrows
71,433

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, 7, 1433

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 7 x 1,433 = 641,984

This can also be written as 26 x 71 x 1,4331 = 641,984

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


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