The Minnesota Historical Society gives the totals as Nelson 206,555 and Calderwood 137,274. These totals appear to have been obtained by ignoring the Soldier vote in Ramsey County.
Knute Nelson would die on April 23, 1923. A special election as held on July 16, 1923 to fill the unexpired term ending March 3, 1925.
Source for Popular Vote data: Minnesota Secretary of State. The Legislative Manual of the State of Minnesota 1919, Minnesota Secretary of State (https://babel.hathitrust.org/cgi/pt?id=uiug.30112001795027&view=1up&seq=709) (accessed 24 Oct 2023)