Q: What are the prime factors of the number 73,621,184?

 A: 2, 7, 13, 12641

Why are those the prime factors of the number 73,621,184?

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 73,621,184

73,621,184
Factor Arrows
236,810,592
Factor Arrows
218,405,296
Factor Arrows
29,202,648
Factor Arrows
24,601,324
Factor Arrows
22,300,662
Factor Arrows
21,150,331
Factor Arrows
7164,333
Factor Arrows
1312,641

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, 7, 13, 12641

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 7 x 13 x 12,641 = 73,621,184

This can also be written as 26 x 71 x 131 x 12,6411 = 73,621,184

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


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