Q: What are the prime factors of the number 642,352?

 A: 2, 19, 2113

Why are those the prime factors of the number 642,352?

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 642,352

642,352
Factor Arrows
2321,176
Factor Arrows
2160,588
Factor Arrows
280,294
Factor Arrows
240,147
Factor Arrows
192,113

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, 19, 2113

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 19 x 2,113 = 642,352

This can also be written as 24 x 191 x 2,1131 = 642,352

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


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