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gcd(m,n)+lcm(m,n) = m+n All-Russian MO 1995 Regional (R4) 10.2

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August 26, 2024
LCMGCDnumber theory

Problem Statement

Natural numbers mm and nn satisfy gcd(m,n)+lcm(m,n)=m+n.gcd(m,n)+lcm(m,n) = m+n. Prove that one of numbers m,nm,n divides the other.