のようなYouTubeチャンネル National Museum of Mathematics


736,000 2.85%

3,390,000 1.13%

2,690,000 3.59%

10,500,000 3.02%

10,300 3.04%




11,900 0.51%

27,800 1.15%

39,600 1.08%



3,950,000 2.52%