Techniques are provided for software code refactoring prioritization using software code defect aggregation in a graphical code representation. One method comprises obtaining an indication of an error in software code; obtaining a graphical representation of the software code, wherein each node in the graphical representation corresponds to a function and wherein nodes are connected based on a hierarchical relationship; assigning a weight to a first node that corresponds to a function associated with the error; assigning a decayed weight to an additional node, selected based on the hierarchical relationship with the first node, wherein the decayed weight is determined by applying a decay function to the weight assigned to the first node; prioritizing nodes in the graphical representation for a code refactoring of the software code based on the weights assigned to each node; and initiating an automated action based on a result of the prioritizing.