Q: What are the prime factors of the number 221,050,536?

 A: 2, 3, 7, 701, 1877

Why are those the prime factors of the number 221,050,536?

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 221,050,536

221,050,536
Factor Arrows
2110,525,268
Factor Arrows
255,262,634
Factor Arrows
227,631,317
Factor Arrows
39,210,439
Factor Arrows
71,315,777
Factor Arrows
7011,877

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, 7, 701, 1877

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 7 x 701 x 1,877 = 221,050,536

This can also be written as 23 x 31 x 71 x 7011 x 1,8771 = 221,050,536

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


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