Partial Ordering and Hasse Diagram.

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Draw the Hasse diagram for the partial ordering “x is a factor of y” on the following sets:

S = {2, 3, 5, 7, 21, 42, 105, 210}

I don't know how to find the partial ordering of this set. I know that to be a partial order it needs to be reflexive, anti symmetric and transitive.

However, this is my Hasse diagram.

photo