Q: What are the prime factors of the number 221,001,210?

 A: 2, 3, 5, 90947

Why are those the prime factors of the number 221,001,210?

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 221,001,210

221,001,210
Factor Arrows
2110,500,605
Factor Arrows
336,833,535
Factor Arrows
312,277,845
Factor Arrows
34,092,615
Factor Arrows
31,364,205
Factor Arrows
3454,735
Factor Arrows
590,947

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, 90947

We can check our work by multiplying all of the prime factors together: 2 x 3 x 3 x 3 x 3 x 3 x 5 x 90,947 = 221,001,210

This can also be written as 21 x 35 x 51 x 90,9471 = 221,001,210

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


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