Q: What are the prime factors of the number 51,645,312?

 A: 2, 3, 127, 353

Why are those the prime factors of the number 51,645,312?

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 51,645,312

51,645,312
Factor Arrows
225,822,656
Factor Arrows
212,911,328
Factor Arrows
26,455,664
Factor Arrows
23,227,832
Factor Arrows
21,613,916
Factor Arrows
2806,958
Factor Arrows
2403,479
Factor Arrows
3134,493
Factor Arrows
344,831
Factor Arrows
127353

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, 127, 353

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 3 x 3 x 127 x 353 = 51,645,312

This can also be written as 27 x 32 x 1271 x 3531 = 51,645,312

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


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