Q: What are the prime factors of the number 981,568?

 A: 2, 7, 313

Why are those the prime factors of the number 981,568?

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 981,568

981,568
Factor Arrows
2490,784
Factor Arrows
2245,392
Factor Arrows
2122,696
Factor Arrows
261,348
Factor Arrows
230,674
Factor Arrows
215,337
Factor Arrows
72,191
Factor Arrows
7313

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, 313

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 7 x 313 = 981,568

This can also be written as 26 x 72 x 3131 = 981,568

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


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