Q: What are the prime factors of the number 1,917,600?

 A: 2, 3, 5, 17, 47

Why are those the prime factors of the number 1,917,600?

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 1,917,600

1,917,600
Factor Arrows
2958,800
Factor Arrows
2479,400
Factor Arrows
2239,700
Factor Arrows
2119,850
Factor Arrows
259,925
Factor Arrows
319,975
Factor Arrows
53,995
Factor Arrows
5799
Factor Arrows
1747

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, 17, 47

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 5 x 5 x 17 x 47 = 1,917,600

This can also be written as 25 x 31 x 52 x 171 x 471 = 1,917,600

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


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