Q: What are the prime factors of the number 16,895,978?

 A: 2, 11, 19, 83, 487

Why are those the prime factors of the number 16,895,978?

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 16,895,978

16,895,978
Factor Arrows
28,447,989
Factor Arrows
11767,999
Factor Arrows
1940,421
Factor Arrows
83487

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, 11, 19, 83, 487

We can check our work by multiplying all of the prime factors together: 2 x 11 x 19 x 83 x 487 = 16,895,978

This can also be written as 21 x 111 x 191 x 831 x 4871 = 16,895,978

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


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