Q: What are the prime factors of the number 55,731,130?

 A: 2, 5, 7, 13, 673

Why are those the prime factors of the number 55,731,130?

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 55,731,130

55,731,130
Factor Arrows
227,865,565
Factor Arrows
55,573,113
Factor Arrows
7796,159
Factor Arrows
7113,737
Factor Arrows
138,749
Factor Arrows
13673

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, 7, 13, 673

We can check our work by multiplying all of the prime factors together: 2 x 5 x 7 x 7 x 13 x 13 x 673 = 55,731,130

This can also be written as 21 x 51 x 72 x 132 x 6731 = 55,731,130

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


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