Q: What are the prime factors of the number 644,600,224?

 A: 2, 149, 135193

Why are those the prime factors of the number 644,600,224?

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 644,600,224

644,600,224
Factor Arrows
2322,300,112
Factor Arrows
2161,150,056
Factor Arrows
280,575,028
Factor Arrows
240,287,514
Factor Arrows
220,143,757
Factor Arrows
149135,193

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, 149, 135193

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 149 x 135,193 = 644,600,224

This can also be written as 25 x 1491 x 135,1931 = 644,600,224

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


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