Q: What are the prime factors of the number 15,388,776?

 A: 2, 3, 13, 41, 401

Why are those the prime factors of the number 15,388,776?

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 15,388,776

15,388,776
Factor Arrows
27,694,388
Factor Arrows
23,847,194
Factor Arrows
21,923,597
Factor Arrows
3641,199
Factor Arrows
3213,733
Factor Arrows
1316,441
Factor Arrows
41401

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, 13, 41, 401

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 3 x 13 x 41 x 401 = 15,388,776

This can also be written as 23 x 32 x 131 x 411 x 4011 = 15,388,776

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


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