Q: What are the prime factors of the number 15,735,680?

 A: 2, 5, 23, 1069

Why are those the prime factors of the number 15,735,680?

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 15,735,680

15,735,680
Factor Arrows
27,867,840
Factor Arrows
23,933,920
Factor Arrows
21,966,960
Factor Arrows
2983,480
Factor Arrows
2491,740
Factor Arrows
2245,870
Factor Arrows
2122,935
Factor Arrows
524,587
Factor Arrows
231,069

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, 23, 1069

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 5 x 23 x 1,069 = 15,735,680

This can also be written as 27 x 51 x 231 x 1,0691 = 15,735,680

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


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