Q: What are the prime factors of the number 919,776?

 A: 2, 3, 11, 13, 67

Why are those the prime factors of the number 919,776?

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 919,776

919,776
Factor Arrows
2459,888
Factor Arrows
2229,944
Factor Arrows
2114,972
Factor Arrows
257,486
Factor Arrows
228,743
Factor Arrows
39,581
Factor Arrows
11871
Factor Arrows
1367

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, 11, 13, 67

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 11 x 13 x 67 = 919,776

This can also be written as 25 x 31 x 111 x 131 x 671 = 919,776

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


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