Stranded conductor and method for manufacturing stranded conductor

A stranded conductor, comprising:

• a plurality of filaments stranded together such that the plurality of filaments comprises a plurality of softened filaments made of an aluminum material and identical to one another and has a lay length in a range of from 6.2 times to 15.7 times a conductor diameter of the stranded conductor,
• wherein the plurality of filaments includes a filament disposed along a center of the stranded conductor, six first filaments disposed around the filament and concentrically with the center, twelve second filaments disposed around the six first filaments and concentrically with the center, and eighteen filaments disposed around the twelve second filaments and concentrically with the center such that the first filaments and the second filaments have an equal lay length, and the filament along the center of the stranded conductor, the six first filaments and the twelve second filaments form an inner layer portion, and the eighteen filaments forms an outermost layer disposed outside of and concentrically with the inner layer portion such that the inner layer portion has an inner layer lay length P3 which is determined by Equation (1),
• P
• ⁢
• ⁢
• 3
• =
• P
• ⁢
• ⁢
• 1
• ×
• P
• ⁢
• ⁢
• 2
• P
• ⁢
• ⁢
• 1
• +
• P
• ⁢
• ⁢
• 2
• (
• 1
• )
• where P1 represents an inner layer lay length prior to formation of the outermost layer, P2 represents an outer layer lay length, and P3 represents the inner layer lay length in a state in which the outermost layer is formed.