That sum is equal to \(\frac{83(84)}{2}=83(42)\). Since 83 is prime, and it is greater than 42, it must be the biggest prime divisor. Therefore, 83 is the answer.

That sum is equal to \(\frac{83(84)}{2}=83(42)\). Since 83 is prime, and it is greater than 42, it must be the biggest prime divisor. Therefore, 83 is the answer.