Q: What are the prime factors of the number 74,545,152?

 A: 2, 3, 11, 1103

Why are those the prime factors of the number 74,545,152?

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 74,545,152

74,545,152
Factor Arrows
237,272,576
Factor Arrows
218,636,288
Factor Arrows
29,318,144
Factor Arrows
24,659,072
Factor Arrows
22,329,536
Factor Arrows
21,164,768
Factor Arrows
2582,384
Factor Arrows
2291,192
Factor Arrows
2145,596
Factor Arrows
272,798
Factor Arrows
236,399
Factor Arrows
312,133
Factor Arrows
111,103

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, 11, 1103

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 2 x 2 x 3 x 11 x 1,103 = 74,545,152

This can also be written as 211 x 31 x 111 x 1,1031 = 74,545,152

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


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