37 and 5
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The only way for three prime numbers to have a sum of 42 is if one of the prime numbers is 2, as 2 is the only even prime number. The other two prime numbers must add up to 40, which can only be achieved by 3 and 37. Therefore, the three prime numbers that have a sum of 42 are 2, 3, and 37.
37 and 5 31 and 11 29 and 13 23 and 19
Add them up. 11 13 17 19 23 29 31 37 41
7 and 6
1, 2, 3, 7 are the prime factors of 42.