URL https://media.istockphoto.com/vectors/number-logo-design-with-a-creative-cut-and-black-circle-background-vector-id1317461986?k=20&m=1317461986&s=612x612&w=0&h=n9_Q_IDWgeqtXOV9pP6qCUhO1utLGIASyew39lUKfxU=
URL2 https://www.istockphoto.com/jp/イラスト/数字の21
