SOLUTION: Find all primes that divide 20!

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Question 1101855: Find all primes that divide 20!
Found 2 solutions by math_helper, greenestamps:
Answer by math_helper(2461) About Me  (Show Source):
You can put this solution on YOUR website!
2 and 5
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I didn't see that it was 20 factorial. I just thought the poster was using emphasis :-)

Answer by greenestamps(13334) About Me  (Show Source):
You can put this solution on YOUR website!


I'm not sure what the other tutor was thinking; maybe he misread the problem.

The prime numbers that divide 20! are all the primes less than 20, and ONLY those primes. So

2, 3, 5, 7, 11, 13, 17, and 19