Q: What are the prime factors of the number 31,404,560?

 A: 2, 5, 11, 127, 281

Why are those the prime factors of the number 31,404,560?

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 31,404,560

31,404,560
Factor Arrows
215,702,280
Factor Arrows
27,851,140
Factor Arrows
23,925,570
Factor Arrows
21,962,785
Factor Arrows
5392,557
Factor Arrows
1135,687
Factor Arrows
127281

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, 5, 11, 127, 281

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 5 x 11 x 127 x 281 = 31,404,560

This can also be written as 24 x 51 x 111 x 1271 x 2811 = 31,404,560

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


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