Q: What are the prime factors of the number 316,661,562?

 A: 2, 3, 7, 19, 23, 71

Why are those the prime factors of the number 316,661,562?

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 316,661,562

316,661,562
Factor Arrows
2158,330,781
Factor Arrows
352,776,927
Factor Arrows
317,592,309
Factor Arrows
35,864,103
Factor Arrows
31,954,701
Factor Arrows
3651,567
Factor Arrows
3217,189
Factor Arrows
731,027
Factor Arrows
191,633
Factor Arrows
2371

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, 3, 7, 19, 23, 71

We can check our work by multiplying all of the prime factors together: 2 x 3 x 3 x 3 x 3 x 3 x 3 x 7 x 19 x 23 x 71 = 316,661,562

This can also be written as 21 x 36 x 71 x 191 x 231 x 711 = 316,661,562

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


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