Q: What are the prime factors of the number 15,949,824?

 A: 2, 3, 11, 59

Why are those the prime factors of the number 15,949,824?

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 15,949,824

15,949,824
Factor Arrows
27,974,912
Factor Arrows
23,987,456
Factor Arrows
21,993,728
Factor Arrows
2996,864
Factor Arrows
2498,432
Factor Arrows
2249,216
Factor Arrows
2124,608
Factor Arrows
262,304
Factor Arrows
231,152
Factor Arrows
215,576
Factor Arrows
27,788
Factor Arrows
23,894
Factor Arrows
21,947
Factor Arrows
3649
Factor Arrows
1159

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, 11, 59

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 3 x 11 x 59 = 15,949,824

This can also be written as 213 x 31 x 111 x 591 = 15,949,824

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


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