Q: What are the prime factors of the number 101,408,400?

 A: 2, 3, 5, 17, 1657

Why are those the prime factors of the number 101,408,400?

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 101,408,400

101,408,400
Factor Arrows
250,704,200
Factor Arrows
225,352,100
Factor Arrows
212,676,050
Factor Arrows
26,338,025
Factor Arrows
32,112,675
Factor Arrows
3704,225
Factor Arrows
5140,845
Factor Arrows
528,169
Factor Arrows
171,657

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, 17, 1657

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 5 x 5 x 17 x 1,657 = 101,408,400

This can also be written as 24 x 32 x 52 x 171 x 1,6571 = 101,408,400

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


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