Sublime Numbers

 

(Image: Grok)

The numbers 12 and 6086555670238378989670371734243169622657830773351885970528324860512791691264 are the two entries in the OEIS sequence: A081357, Sublime Numbers. 

In number theory, a sublime number is a positive integer which has a perfect number of positive factors (including itself), and whose positive factors add up to another perfect number.

The first entry, 12, has a perfect number of positive factors (6): 1, 2, 3, 4, 6, and 12, and the sum of these is again a perfect number: 1 + 2 + 3 + 4 + 6 + 12 = 28.

The second entry, above, is the product: (2¹²⁶)(2⁶¹ − 1)(2³¹ − 1)(2¹⁹ − 1)(2⁷ − 1)(2⁵ − 1)(2³ − 1).