Q: What are the prime factors of the number 919,040?

 A: 2, 5, 359

Why are those the prime factors of the number 919,040?

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 919,040

919,040
Factor Arrows
2459,520
Factor Arrows
2229,760
Factor Arrows
2114,880
Factor Arrows
257,440
Factor Arrows
228,720
Factor Arrows
214,360
Factor Arrows
27,180
Factor Arrows
23,590
Factor Arrows
21,795
Factor Arrows
5359

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, 5, 359

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 2 x 2 x 2 x 5 x 359 = 919,040

This can also be written as 29 x 51 x 3591 = 919,040

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


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