Q: What are the prime factors of the number 69,778,830?

 A: 2, 3, 5, 11, 19, 31, 359

Why are those the prime factors of the number 69,778,830?

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 69,778,830

69,778,830
Factor Arrows
234,889,415
Factor Arrows
311,629,805
Factor Arrows
52,325,961
Factor Arrows
11211,451
Factor Arrows
1911,129
Factor Arrows
31359

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, 5, 11, 19, 31, 359

We can check our work by multiplying all of the prime factors together: 2 x 3 x 5 x 11 x 19 x 31 x 359 = 69,778,830

This can also be written as 21 x 31 x 51 x 111 x 191 x 311 x 3591 = 69,778,830

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


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