# Sums + number theory

$\text{lcm}(1,77) + \text{lcm}(2,77) + \text{lcm}(3,77) + \cdots + \text{lcm}(77,77) = \, ?$

Notation: $$\text{lcm}(a,b)$$ denote the Lowest Common Multiple of $$a$$ and $$b$$.

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