Q: What are the prime factors of the number 100,110,400?

 A: 2, 5, 13, 4813

Why are those the prime factors of the number 100,110,400?

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 100,110,400

100,110,400
Factor Arrows
250,055,200
Factor Arrows
225,027,600
Factor Arrows
212,513,800
Factor Arrows
26,256,900
Factor Arrows
23,128,450
Factor Arrows
21,564,225
Factor Arrows
5312,845
Factor Arrows
562,569
Factor Arrows
134,813

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, 4813

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 5 x 5 x 13 x 4,813 = 100,110,400

This can also be written as 26 x 52 x 131 x 4,8131 = 100,110,400

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


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