Q: What are the prime factors of the number 16,555,365?

 A: 3, 5, 17, 19, 67

Why are those the prime factors of the number 16,555,365?

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 16,555,365

16,555,365
Factor Arrows
35,518,455
Factor Arrows
31,839,485
Factor Arrows
5367,897
Factor Arrows
1721,641
Factor Arrows
171,273
Factor Arrows
1967

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:

3, 5, 17, 19, 67

We can check our work by multiplying all of the prime factors together: 3 x 3 x 5 x 17 x 17 x 19 x 67 = 16,555,365

This can also be written as 32 x 51 x 172 x 191 x 671 = 16,555,365

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


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