Q: What are the prime factors of the number 25,015,840?

 A: 2, 5, 17, 541

Why are those the prime factors of the number 25,015,840?

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 25,015,840

25,015,840
Factor Arrows
212,507,920
Factor Arrows
26,253,960
Factor Arrows
23,126,980
Factor Arrows
21,563,490
Factor Arrows
2781,745
Factor Arrows
5156,349
Factor Arrows
179,197
Factor Arrows
17541

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, 5, 17, 541

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 5 x 17 x 17 x 541 = 25,015,840

This can also be written as 25 x 51 x 172 x 5411 = 25,015,840

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


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