Q: What are the prime factors of the number 841,440?

 A: 2, 3, 5, 1753

Why are those the prime factors of the number 841,440?

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 841,440

841,440
Factor Arrows
2420,720
Factor Arrows
2210,360
Factor Arrows
2105,180
Factor Arrows
252,590
Factor Arrows
226,295
Factor Arrows
38,765
Factor Arrows
51,753

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, 1753

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 1,753 = 841,440

This can also be written as 25 x 31 x 51 x 1,7531 = 841,440

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


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