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What is the sum of divisors of the number 1872?(a) 12493(b) 5438(c) 45862(d) 654I got this question in an online interview.Question is from Counting in portion Counting of Discrete Mathematics

Answer»

Right ANSWER is (a) 12493

Easy explanation: The prime FACTORIZATION of 1872 is 13 * 3^2 * 2^4 and S(2^4) = 1 + 2 + 4 + 8 + 16 = 31, S(5^2) = 1 + 5 + 25 = 31. Therefore, S(1872) = 31 * 31 * 13 = 12493.



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