Q: What are the prime factors of the number 61,462,464?

 A: 2, 3, 7, 47, 139

Why are those the prime factors of the number 61,462,464?

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 61,462,464

61,462,464
Factor Arrows
230,731,232
Factor Arrows
215,365,616
Factor Arrows
27,682,808
Factor Arrows
23,841,404
Factor Arrows
21,920,702
Factor Arrows
2960,351
Factor Arrows
3320,117
Factor Arrows
745,731
Factor Arrows
76,533
Factor Arrows
47139

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, 47, 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 3 x 7 x 7 x 47 x 139 = 61,462,464

This can also be written as 26 x 31 x 72 x 471 x 1391 = 61,462,464

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


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