Q: What are the prime factors of the number 31,124,448?

 A: 2, 3, 67, 1613

Why are those the prime factors of the number 31,124,448?

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 31,124,448

31,124,448
Factor Arrows
215,562,224
Factor Arrows
27,781,112
Factor Arrows
23,890,556
Factor Arrows
21,945,278
Factor Arrows
2972,639
Factor Arrows
3324,213
Factor Arrows
3108,071
Factor Arrows
671,613

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, 67, 1613

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 3 x 67 x 1,613 = 31,124,448

This can also be written as 25 x 32 x 671 x 1,6131 = 31,124,448

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


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