Q: What are the prime factors of the number 261,156,625?

 A: 5, 2089253

Why are those the prime factors of the number 261,156,625?

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 261,156,625

261,156,625
Factor Arrows
552,231,325
Factor Arrows
510,446,265
Factor Arrows
52,089,253

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:

5, 2089253

We can check our work by multiplying all of the prime factors together: 5 x 5 x 5 x 2,089,253 = 261,156,625

This can also be written as 53 x 2,089,2531 = 261,156,625

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


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