Q: What are the prime factors of the number 61,885,728?

 A: 2, 3, 41, 1747

Why are those the prime factors of the number 61,885,728?

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 61,885,728

61,885,728
Factor Arrows
230,942,864
Factor Arrows
215,471,432
Factor Arrows
27,735,716
Factor Arrows
23,867,858
Factor Arrows
21,933,929
Factor Arrows
3644,643
Factor Arrows
3214,881
Factor Arrows
371,627
Factor Arrows
411,747

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, 41, 1747

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 3 x 41 x 1,747 = 61,885,728

This can also be written as 25 x 33 x 411 x 1,7471 = 61,885,728

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


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