Q: What are the prime factors of the number 16,691,688?

 A: 2, 3, 13, 17, 1049

Why are those the prime factors of the number 16,691,688?

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 16,691,688

16,691,688
Factor Arrows
28,345,844
Factor Arrows
24,172,922
Factor Arrows
22,086,461
Factor Arrows
3695,487
Factor Arrows
3231,829
Factor Arrows
1317,833
Factor Arrows
171,049

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, 17, 1049

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 17 x 1,049 = 16,691,688

This can also be written as 23 x 32 x 131 x 171 x 1,0491 = 16,691,688

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


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