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Question

Find the sum of the divisors of 18

Solution
Verified by Toppr

Standard form of 18 is 21×32

σ(18)=(21+1121)×(32+1131)

=(22121)×(33131)

=(4121)×(27131)

=(31)×(262)

=3×13=39

Sum of divisors of 18=39

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