Q: What are the prime factors of the number 9,761,440?

 A: 2, 5, 13, 19

Why are those the prime factors of the number 9,761,440?

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 9,761,440

9,761,440
Factor Arrows
24,880,720
Factor Arrows
22,440,360
Factor Arrows
21,220,180
Factor Arrows
2610,090
Factor Arrows
2305,045
Factor Arrows
561,009
Factor Arrows
134,693
Factor Arrows
13361
Factor Arrows
1919

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, 13, 19

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 5 x 13 x 13 x 19 x 19 = 9,761,440

This can also be written as 25 x 51 x 132 x 192 = 9,761,440

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


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