Q: What are the prime factors of the number 53,331,520?

 A: 2, 5, 11, 109, 139

Why are those the prime factors of the number 53,331,520?

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 53,331,520

53,331,520
Factor Arrows
226,665,760
Factor Arrows
213,332,880
Factor Arrows
26,666,440
Factor Arrows
23,333,220
Factor Arrows
21,666,610
Factor Arrows
2833,305
Factor Arrows
5166,661
Factor Arrows
1115,151
Factor Arrows
109139

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, 109, 139

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 2 x 5 x 11 x 109 x 139 = 53,331,520

This can also be written as 26 x 51 x 111 x 1091 x 1391 = 53,331,520

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


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