Q: What are the prime factors of the number 25,615,360?

 A: 2, 5, 5003

Why are those the prime factors of the number 25,615,360?

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 25,615,360

25,615,360
Factor Arrows
212,807,680
Factor Arrows
26,403,840
Factor Arrows
23,201,920
Factor Arrows
21,600,960
Factor Arrows
2800,480
Factor Arrows
2400,240
Factor Arrows
2200,120
Factor Arrows
2100,060
Factor Arrows
250,030
Factor Arrows
225,015
Factor Arrows
55,003

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, 5003

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 2 x 2 x 2 x 2 x 5 x 5,003 = 25,615,360

This can also be written as 210 x 51 x 5,0031 = 25,615,360

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


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