Q: What are the prime factors of the number 55,419,648?

 A: 2, 3, 72161

Why are those the prime factors of the number 55,419,648?

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 55,419,648

55,419,648
Factor Arrows
227,709,824
Factor Arrows
213,854,912
Factor Arrows
26,927,456
Factor Arrows
23,463,728
Factor Arrows
21,731,864
Factor Arrows
2865,932
Factor Arrows
2432,966
Factor Arrows
2216,483
Factor Arrows
372,161

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, 72161

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 3 x 72,161 = 55,419,648

This can also be written as 28 x 31 x 72,1611 = 55,419,648

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


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