Coil component and method of manufacturing coil component

A coil component comprising:

• a drum-shaped core including a core part, the core part having a circumferential surface including a first surface and a second surface parallel to each other;
• and
• a coil including two wires wound around the core part in the same direction which is a winding direction,
• wherein
• the coil includes multiple twisted wire parts with the two wires twisted together,
• each of the twisted wire parts is on each of surfaces configuring the circumferential surface respectively,
• the twisted wire part on the first surface and the twisted wire part on the second surface are identical in shape,
• a ridge part is defined as a boundary between two adjacent surfaces of the circumferential surface in a circumferential direction of the core part,
• a knot part is defined as a location where the two wires overlap each other in a direction orthogonal to the circumferential surface, and
• when an area where the two wires do not overlap each other in a direction orthogonal to the circumferential surface is defined as a swell part,
• all of the ridge parts have a swell part disposed thereon,
• each of the twisted wire parts includes at least one knot part,
• the coil has multiple of the knot parts spaced equidistantly in the winding direction of the wires, and
• in a cross-section orthogonal to an axial direction of the core part, every side length configuring the cross-section is an integer multiple of the spacing between multiple knot parts in the winding direction of the wires.