Q: What are the prime factors of the number 273,440,640?

 A: 2, 3, 5, 11, 107

Why are those the prime factors of the number 273,440,640?

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 273,440,640

273,440,640
Factor Arrows
2136,720,320
Factor Arrows
268,360,160
Factor Arrows
234,180,080
Factor Arrows
217,090,040
Factor Arrows
28,545,020
Factor Arrows
24,272,510
Factor Arrows
22,136,255
Factor Arrows
3712,085
Factor Arrows
5142,417
Factor Arrows
1112,947
Factor Arrows
111,177
Factor Arrows
11107

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, 11, 107

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 5 x 11 x 11 x 11 x 107 = 273,440,640

This can also be written as 27 x 31 x 51 x 113 x 1071 = 273,440,640

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


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