Q: What are the prime factors of the number 25,215,030?

 A: 2, 3, 5, 47, 1987

Why are those the prime factors of the number 25,215,030?

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 25,215,030

25,215,030
Factor Arrows
212,607,515
Factor Arrows
34,202,505
Factor Arrows
31,400,835
Factor Arrows
3466,945
Factor Arrows
593,389
Factor Arrows
471,987

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, 47, 1987

We can check our work by multiplying all of the prime factors together: 2 x 3 x 3 x 3 x 5 x 47 x 1,987 = 25,215,030

This can also be written as 21 x 33 x 51 x 471 x 1,9871 = 25,215,030

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


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