Q: What are the prime factors of the number 61,212,160?

 A: 2, 5, 23911

Why are those the prime factors of the number 61,212,160?

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 61,212,160

61,212,160
Factor Arrows
230,606,080
Factor Arrows
215,303,040
Factor Arrows
27,651,520
Factor Arrows
23,825,760
Factor Arrows
21,912,880
Factor Arrows
2956,440
Factor Arrows
2478,220
Factor Arrows
2239,110
Factor Arrows
2119,555
Factor Arrows
523,911

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, 23911

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 2 x 2 x 2 x 5 x 23,911 = 61,212,160

This can also be written as 29 x 51 x 23,9111 = 61,212,160

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


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