Q: What are the prime factors of the number 101,214,400?

 A: 2, 5, 7, 1291

Why are those the prime factors of the number 101,214,400?

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 101,214,400

101,214,400
Factor Arrows
250,607,200
Factor Arrows
225,303,600
Factor Arrows
212,651,800
Factor Arrows
26,325,900
Factor Arrows
23,162,950
Factor Arrows
21,581,475
Factor Arrows
5316,295
Factor Arrows
563,259
Factor Arrows
79,037
Factor Arrows
71,291

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, 1291

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 7 x 7 x 1,291 = 101,214,400

This can also be written as 26 x 52 x 72 x 1,2911 = 101,214,400

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


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