Q: What are the prime factors of the number 684,544?

 A: 2, 7, 191

Why are those the prime factors of the number 684,544?

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 684,544

684,544
Factor Arrows
2342,272
Factor Arrows
2171,136
Factor Arrows
285,568
Factor Arrows
242,784
Factor Arrows
221,392
Factor Arrows
210,696
Factor Arrows
25,348
Factor Arrows
22,674
Factor Arrows
21,337
Factor Arrows
7191

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, 191

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 2 x 2 x 2 x 7 x 191 = 684,544

This can also be written as 29 x 71 x 1911 = 684,544

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


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