Q: What are the prime factors of the number 15,054,240?

 A: 2, 3, 5, 79, 397

Why are those the prime factors of the number 15,054,240?

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 15,054,240

15,054,240
Factor Arrows
27,527,120
Factor Arrows
23,763,560
Factor Arrows
21,881,780
Factor Arrows
2940,890
Factor Arrows
2470,445
Factor Arrows
3156,815
Factor Arrows
531,363
Factor Arrows
79397

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, 79, 397

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 3 x 5 x 79 x 397 = 15,054,240

This can also be written as 25 x 31 x 51 x 791 x 3971 = 15,054,240

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


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