SDCL § 21-52-28: Redemption by cotenant--Other cotenants obligated to contribute.

When title to real property subject to redemption is held by cotenants one or more of such cotenants may redeem, by paying the whole sum required to effect redemption. When redemption is made by one or more cotenants, all other cotenants of the property become obligated to contribute their proportionate shares of the sum paid by the redeeming cotenants, to effect redemption.