Q: What are the prime factors of the number 5,639,840?

 A: 2, 5, 101, 349

Why are those the prime factors of the number 5,639,840?

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 5,639,840

5,639,840
Factor Arrows
22,819,920
Factor Arrows
21,409,960
Factor Arrows
2704,980
Factor Arrows
2352,490
Factor Arrows
2176,245
Factor Arrows
535,249
Factor Arrows
101349

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, 5, 101, 349

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 5 x 101 x 349 = 5,639,840

This can also be written as 25 x 51 x 1011 x 3491 = 5,639,840

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


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