Q: What are the prime factors of the number 16,155,738?

 A: 2, 3, 19, 97, 487

Why are those the prime factors of the number 16,155,738?

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 16,155,738

16,155,738
Factor Arrows
28,077,869
Factor Arrows
32,692,623
Factor Arrows
3897,541
Factor Arrows
1947,239
Factor Arrows
97487

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, 19, 97, 487

We can check our work by multiplying all of the prime factors together: 2 x 3 x 3 x 19 x 97 x 487 = 16,155,738

This can also be written as 21 x 32 x 191 x 971 x 4871 = 16,155,738

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


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