Q: What are the prime factors of the number 25,140,544?

 A: 2, 11, 13, 41, 67

Why are those the prime factors of the number 25,140,544?

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 25,140,544

25,140,544
Factor Arrows
212,570,272
Factor Arrows
26,285,136
Factor Arrows
23,142,568
Factor Arrows
21,571,284
Factor Arrows
2785,642
Factor Arrows
2392,821
Factor Arrows
1135,711
Factor Arrows
132,747
Factor Arrows
4167

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, 11, 13, 41, 67

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 11 x 13 x 41 x 67 = 25,140,544

This can also be written as 26 x 111 x 131 x 411 x 671 = 25,140,544

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


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