Q: What are the prime factors of the number 2,220,120?

 A: 2, 3, 5, 7, 881

Why are those the prime factors of the number 2,220,120?

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 2,220,120

2,220,120
Factor Arrows
21,110,060
Factor Arrows
2555,030
Factor Arrows
2277,515
Factor Arrows
392,505
Factor Arrows
330,835
Factor Arrows
56,167
Factor Arrows
7881

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, 7, 881

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 3 x 5 x 7 x 881 = 2,220,120

This can also be written as 23 x 32 x 51 x 71 x 8811 = 2,220,120

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


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