Q: What are the prime factors of the number 369,216?

 A: 2, 3, 641

Why are those the prime factors of the number 369,216?

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 369,216

369,216
Factor Arrows
2184,608
Factor Arrows
292,304
Factor Arrows
246,152
Factor Arrows
223,076
Factor Arrows
211,538
Factor Arrows
25,769
Factor Arrows
31,923
Factor Arrows
3641

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, 641

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 2 x 3 x 3 x 641 = 369,216

This can also be written as 26 x 32 x 6411 = 369,216

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


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