Q: What are the prime factors of the number 68,384,448?

 A: 2, 3, 11, 43, 251

Why are those the prime factors of the number 68,384,448?

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 68,384,448

68,384,448
Factor Arrows
234,192,224
Factor Arrows
217,096,112
Factor Arrows
28,548,056
Factor Arrows
24,274,028
Factor Arrows
22,137,014
Factor Arrows
21,068,507
Factor Arrows
3356,169
Factor Arrows
3118,723
Factor Arrows
1110,793
Factor Arrows
43251

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, 43, 251

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 3 x 3 x 11 x 43 x 251 = 68,384,448

This can also be written as 26 x 32 x 111 x 431 x 2511 = 68,384,448

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


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