Q: What are the prime factors of the number 131,414,400?

 A: 2, 3, 5, 13

Why are those the prime factors of the number 131,414,400?

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 131,414,400

131,414,400
Factor Arrows
265,707,200
Factor Arrows
232,853,600
Factor Arrows
216,426,800
Factor Arrows
28,213,400
Factor Arrows
24,106,700
Factor Arrows
22,053,350
Factor Arrows
21,026,675
Factor Arrows
3342,225
Factor Arrows
3114,075
Factor Arrows
338,025
Factor Arrows
312,675
Factor Arrows
34,225
Factor Arrows
5845
Factor Arrows
5169
Factor Arrows
1313

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, 13

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 3 x 3 x 3 x 3 x 3 x 5 x 5 x 13 x 13 = 131,414,400

This can also be written as 27 x 35 x 52 x 132 = 131,414,400

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


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