olymmath

KöMaL 2024 B5366

    Is it possible to find a composite number n>1n>1 with the following property: if 1=d1<d2<…<dk=n1=d_1<d_2<\ldots<d_k=n denote the positive divisors of nn, then did_i is divisible by (di−1+di−2)(d_{i-1} + d_{i-2}) for all 3≤i≤k3 \leq i \leq k?

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