Q: What are the prime factors of the number 102,342,400?

 A: 2, 5, 15991

Why are those the prime factors of the number 102,342,400?

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 102,342,400

102,342,400
Factor Arrows
251,171,200
Factor Arrows
225,585,600
Factor Arrows
212,792,800
Factor Arrows
26,396,400
Factor Arrows
23,198,200
Factor Arrows
21,599,100
Factor Arrows
2799,550
Factor Arrows
2399,775
Factor Arrows
579,955
Factor Arrows
515,991

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, 15991

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 5 x 5 x 15,991 = 102,342,400

This can also be written as 28 x 52 x 15,9911 = 102,342,400

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


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