Q: What are the prime factors of the number 51,581,166?

 A: 2, 3, 7, 13, 43

Why are those the prime factors of the number 51,581,166?

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 51,581,166

51,581,166
Factor Arrows
225,790,583
Factor Arrows
38,596,861
Factor Arrows
71,228,123
Factor Arrows
1394,471
Factor Arrows
137,267
Factor Arrows
13559
Factor Arrows
1343

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, 13, 43

We can check our work by multiplying all of the prime factors together: 2 x 3 x 7 x 13 x 13 x 13 x 13 x 43 = 51,581,166

This can also be written as 21 x 31 x 71 x 134 x 431 = 51,581,166

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


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