Q: What are the prime factors of the number 51,983,316?

 A: 2, 3, 7, 11, 19, 47

Why are those the prime factors of the number 51,983,316?

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 51,983,316

51,983,316
Factor Arrows
225,991,658
Factor Arrows
212,995,829
Factor Arrows
34,331,943
Factor Arrows
31,443,981
Factor Arrows
3481,327
Factor Arrows
768,761
Factor Arrows
79,823
Factor Arrows
11893
Factor Arrows
1947

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, 11, 19, 47

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 3 x 3 x 7 x 7 x 11 x 19 x 47 = 51,983,316

This can also be written as 22 x 33 x 72 x 111 x 191 x 471 = 51,983,316

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


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