Q: What are the prime factors of the number 989,760?

 A: 2, 3, 5, 1031

Why are those the prime factors of the number 989,760?

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 989,760

989,760
Factor Arrows
2494,880
Factor Arrows
2247,440
Factor Arrows
2123,720
Factor Arrows
261,860
Factor Arrows
230,930
Factor Arrows
215,465
Factor Arrows
35,155
Factor Arrows
51,031

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, 1031

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 5 x 1,031 = 989,760

This can also be written as 26 x 31 x 51 x 1,0311 = 989,760

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


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