1.

Calculate sum of divisors of n = 8620.(a) 7549(b) 54201(c) 18102(d) 654I had been asked this question by my school principal while I was bunking the class.My doubt is from Counting in portion Counting of Discrete Mathematics

Answer»

The CORRECT choice is (c) 18102

Explanation: The prime factorization of 1800 is 431 * 2^2 * 5 and

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

S(5^2) = 1 + 5 = 6

Therefore, S(1800) = 6 * 7 * 431 = 18102.



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