Q: What are the prime factors of the number 5,138,432?

 A: 2, 13, 193

Why are those the prime factors of the number 5,138,432?

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 5,138,432

5,138,432
Factor Arrows
22,569,216
Factor Arrows
21,284,608
Factor Arrows
2642,304
Factor Arrows
2321,152
Factor Arrows
2160,576
Factor Arrows
280,288
Factor Arrows
240,144
Factor Arrows
220,072
Factor Arrows
210,036
Factor Arrows
25,018
Factor Arrows
22,509
Factor Arrows
13193

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, 13, 193

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 2 x 2 x 2 x 13 x 193 = 5,138,432

This can also be written as 211 x 131 x 1931 = 5,138,432

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


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