Q: What are the prime factors of the number 10,620,720?

 A: 2, 3, 5, 11, 149

Why are those the prime factors of the number 10,620,720?

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 10,620,720

10,620,720
Factor Arrows
25,310,360
Factor Arrows
22,655,180
Factor Arrows
21,327,590
Factor Arrows
2663,795
Factor Arrows
3221,265
Factor Arrows
373,755
Factor Arrows
324,585
Factor Arrows
38,195
Factor Arrows
51,639
Factor Arrows
11149

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, 11, 149

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 3 x 3 x 5 x 11 x 149 = 10,620,720

This can also be written as 24 x 34 x 51 x 111 x 1491 = 10,620,720

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


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