Q: What are the prime factors of the number 31,050,240?

 A: 2, 3, 5, 13, 311

Why are those the prime factors of the number 31,050,240?

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 31,050,240

31,050,240
Factor Arrows
215,525,120
Factor Arrows
27,762,560
Factor Arrows
23,881,280
Factor Arrows
21,940,640
Factor Arrows
2970,320
Factor Arrows
2485,160
Factor Arrows
2242,580
Factor Arrows
2121,290
Factor Arrows
260,645
Factor Arrows
320,215
Factor Arrows
54,043
Factor Arrows
13311

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, 311

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 3 x 5 x 13 x 311 = 31,050,240

This can also be written as 29 x 31 x 51 x 131 x 3111 = 31,050,240

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


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