Q: What are the prime factors of the number 25,405,308?

 A: 2, 3, 139, 5077

Why are those the prime factors of the number 25,405,308?

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 25,405,308

25,405,308
Factor Arrows
212,702,654
Factor Arrows
26,351,327
Factor Arrows
32,117,109
Factor Arrows
3705,703
Factor Arrows
1395,077

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, 139, 5077

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 3 x 139 x 5,077 = 25,405,308

This can also be written as 22 x 32 x 1391 x 5,0771 = 25,405,308

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


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