Q: What are the prime factors of the number 74,540,064?

 A: 2, 3, 479, 1621

Why are those the prime factors of the number 74,540,064?

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 74,540,064

74,540,064
Factor Arrows
237,270,032
Factor Arrows
218,635,016
Factor Arrows
29,317,508
Factor Arrows
24,658,754
Factor Arrows
22,329,377
Factor Arrows
3776,459
Factor Arrows
4791,621

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, 479, 1621

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 3 x 479 x 1,621 = 74,540,064

This can also be written as 25 x 31 x 4791 x 1,6211 = 74,540,064

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


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