Q: What are the prime factors of the number 25,018,368?

 A: 2, 3, 509

Why are those the prime factors of the number 25,018,368?

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 25,018,368

25,018,368
Factor Arrows
212,509,184
Factor Arrows
26,254,592
Factor Arrows
23,127,296
Factor Arrows
21,563,648
Factor Arrows
2781,824
Factor Arrows
2390,912
Factor Arrows
2195,456
Factor Arrows
297,728
Factor Arrows
248,864
Factor Arrows
224,432
Factor Arrows
212,216
Factor Arrows
26,108
Factor Arrows
23,054
Factor Arrows
21,527
Factor Arrows
3509

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, 509

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 2 x 2 x 2 x 2 x 3 x 509 = 25,018,368

This can also be written as 214 x 31 x 5091 = 25,018,368

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


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