Q: What are the prime factors of the number 25,454,520?

 A: 2, 3, 5, 7, 13, 37

Why are those the prime factors of the number 25,454,520?

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 25,454,520

25,454,520
Factor Arrows
212,727,260
Factor Arrows
26,363,630
Factor Arrows
23,181,815
Factor Arrows
31,060,605
Factor Arrows
3353,535
Factor Arrows
3117,845
Factor Arrows
523,569
Factor Arrows
73,367
Factor Arrows
7481
Factor Arrows
1337

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, 5, 7, 13, 37

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 3 x 3 x 5 x 7 x 7 x 13 x 37 = 25,454,520

This can also be written as 23 x 33 x 51 x 72 x 131 x 371 = 25,454,520

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


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