Q: What are the prime factors of the number 61,315,200?

 A: 2, 3, 5, 2129

Why are those the prime factors of the number 61,315,200?

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 61,315,200

61,315,200
Factor Arrows
230,657,600
Factor Arrows
215,328,800
Factor Arrows
27,664,400
Factor Arrows
23,832,200
Factor Arrows
21,916,100
Factor Arrows
2958,050
Factor Arrows
2479,025
Factor Arrows
3159,675
Factor Arrows
353,225
Factor Arrows
510,645
Factor Arrows
52,129

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, 5, 2129

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 5 x 5 x 2,129 = 61,315,200

This can also be written as 27 x 32 x 52 x 2,1291 = 61,315,200

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


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