Problem

Source: Tuymaada Junior 2005 p8

Tags: number theory, number theory with sequences, Sequence



The sequence of natural numbers is based on the following rule: each term, starting with the second, is obtained from the previous addition works of all its various simple divisors (for example, after the number $12$ should be the number $18$, and after the number $125$ , the number $130$). Prove that any two sequences constructed in this way have a common member.