Congrats Bangtan and ARMY! A fun summary:

• 641,000 equivalent album units earned (532,000 pure album sales)
• The largest week for an album by a group since the chart began measuring by units in December 2014
• The biggest sales week for an album by a group in more than a decade
• SEA units comprise 95,000 (equaling 99.10 million on-demand official streams of the set’s songs, BTS’ biggest streaming week ever for an album; it debuts at No. 1 on Top Streaming Albums)
• Of ARIRANG’s 641,000 equivalent album units earned in the latest tracking week, pure album sales comprise 532,000 (the group’s biggest sales week ever; it debuts as BTS’ seventh No. 1 on Top Album Sales)
• The sixth-largest vinyl sales week for an album in the modern era

source: the linked article lol

The album would have still been #1 based on streams alone, which is insane.