Q: What are the prime factors of the number 15,305,040?

 A: 2, 3, 5, 29, 733

Why are those the prime factors of the number 15,305,040?

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 15,305,040

15,305,040
Factor Arrows
27,652,520
Factor Arrows
23,826,260
Factor Arrows
21,913,130
Factor Arrows
2956,565
Factor Arrows
3318,855
Factor Arrows
3106,285
Factor Arrows
521,257
Factor Arrows
29733

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, 29, 733

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 3 x 5 x 29 x 733 = 15,305,040

This can also be written as 24 x 32 x 51 x 291 x 7331 = 15,305,040

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


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