Q: What are the prime factors of the number 74,040,736?

 A: 2, 7, 11, 151, 199

Why are those the prime factors of the number 74,040,736?

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 74,040,736

74,040,736
Factor Arrows
237,020,368
Factor Arrows
218,510,184
Factor Arrows
29,255,092
Factor Arrows
24,627,546
Factor Arrows
22,313,773
Factor Arrows
7330,539
Factor Arrows
1130,049
Factor Arrows
151199

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, 11, 151, 199

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 7 x 11 x 151 x 199 = 74,040,736

This can also be written as 25 x 71 x 111 x 1511 x 1991 = 74,040,736

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


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