Q: What are the prime factors of the number 124,455,100?

 A: 2, 5, 7, 11, 2309

Why are those the prime factors of the number 124,455,100?

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 124,455,100

124,455,100
Factor Arrows
262,227,550
Factor Arrows
231,113,775
Factor Arrows
56,222,755
Factor Arrows
51,244,551
Factor Arrows
7177,793
Factor Arrows
725,399
Factor Arrows
112,309

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, 7, 11, 2309

We can check our work by multiplying all of the prime factors together: 2 x 2 x 5 x 5 x 7 x 7 x 11 x 2,309 = 124,455,100

This can also be written as 22 x 52 x 72 x 111 x 2,3091 = 124,455,100

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


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