Q: What are the prime factors of the number 13,263,120?

 A: 2, 3, 5, 13, 109

Why are those the prime factors of the number 13,263,120?

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 13,263,120

13,263,120
Factor Arrows
26,631,560
Factor Arrows
23,315,780
Factor Arrows
21,657,890
Factor Arrows
2828,945
Factor Arrows
3276,315
Factor Arrows
392,105
Factor Arrows
518,421
Factor Arrows
131,417
Factor Arrows
13109

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, 13, 109

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 3 x 5 x 13 x 13 x 109 = 13,263,120

This can also be written as 24 x 32 x 51 x 132 x 1091 = 13,263,120

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


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