CAT 2020 Number System Question (Medium)

Question

How many pairs a,b of positive integers are there such that a b and ab 42017 ?

Accepted Answer

Step 1 We are given the equation We are to find the number of pairs of positive integers such that Step 2 For every positive integer pair such that , must divide 42017, and So, the number of such pairs is equal to the number of positive integer divisors of 42017 where Each divisor of 42017 correspon

CAT 2020

Quantitative

Number System

Medium

How many pairs (a,b) of positive integers are there such that a ≤ b and ab = 42017 ?

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