Q: What are the prime factors of the number 51,990,624?

 A: 2, 3, 7, 17, 37, 41

Why are those the prime factors of the number 51,990,624?

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 51,990,624

51,990,624
Factor Arrows
225,995,312
Factor Arrows
212,997,656
Factor Arrows
26,498,828
Factor Arrows
23,249,414
Factor Arrows
21,624,707
Factor Arrows
3541,569
Factor Arrows
3180,523
Factor Arrows
725,789
Factor Arrows
171,517
Factor Arrows
3741

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, 17, 37, 41

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 3 x 3 x 7 x 17 x 37 x 41 = 51,990,624

This can also be written as 25 x 32 x 71 x 171 x 371 x 411 = 51,990,624

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


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