Q: What are the prime factors of the number 2,740,128?

 A: 2, 3, 17, 23, 73

Why are those the prime factors of the number 2,740,128?

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 2,740,128

2,740,128
Factor Arrows
21,370,064
Factor Arrows
2685,032
Factor Arrows
2342,516
Factor Arrows
2171,258
Factor Arrows
285,629
Factor Arrows
328,543
Factor Arrows
171,679
Factor Arrows
2373

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, 17, 23, 73

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 3 x 17 x 23 x 73 = 2,740,128

This can also be written as 25 x 31 x 171 x 231 x 731 = 2,740,128

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


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