Q: What are the prime factors of the number 828,960?

 A: 2, 3, 5, 11, 157

Why are those the prime factors of the number 828,960?

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 828,960

828,960
Factor Arrows
2414,480
Factor Arrows
2207,240
Factor Arrows
2103,620
Factor Arrows
251,810
Factor Arrows
225,905
Factor Arrows
38,635
Factor Arrows
51,727
Factor Arrows
11157

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, 5, 11, 157

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 3 x 5 x 11 x 157 = 828,960

This can also be written as 25 x 31 x 51 x 111 x 1571 = 828,960

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


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