Q: What are the prime factors of the number 123,341,824?

 A: 2, 23, 5237

Why are those the prime factors of the number 123,341,824?

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 123,341,824

123,341,824
Factor Arrows
261,670,912
Factor Arrows
230,835,456
Factor Arrows
215,417,728
Factor Arrows
27,708,864
Factor Arrows
23,854,432
Factor Arrows
21,927,216
Factor Arrows
2963,608
Factor Arrows
2481,804
Factor Arrows
2240,902
Factor Arrows
2120,451
Factor Arrows
235,237

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, 23, 5237

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 2 x 23 x 5,237 = 123,341,824

This can also be written as 210 x 231 x 5,2371 = 123,341,824

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


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