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Calculate sum of divisors of n = 1900.(a) 6530(b) 5346(c) 3387(d) 4123This question was posed to me by my school teacher while I was bunking the class.Question is from Counting in chapter Counting of Discrete Mathematics

Answer»

The correct OPTION is (d) 4123

The best explanation: The PRIME factorization of 1800 is 19 * 2^2 * 5^2 and

S(2^2) = 1 + 2 + 4 = 7

S(5^2) = 1 + 5 + 25 = 31

Therefore, S(1800) = 19 * 7 * 31 = 4123.



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