CGIFT - Editorial

PROBLEM LINK:

Practice
Contest

Author: Sudhanshu Gupta
Tester: Sudhanshu Gupta
Editorialist: Sudhanshu Gupta

DIFFICULTY:

HARD

PREREQUISITES:

Math

PROBLEM:

For a given positive integer N find the number of all pairs (a, b) of positive integers such that 1 <= a < b <= N and the sum a + b divides the product a * b.

EXPLANATION:





SOLUTIONS:

Solution can be found here.

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