152
posted ago by penisse (context) ago by penisse +156 / -4

From https://en.wikipedia.org/wiki/284_(number) :

  • Its divisors are 1, 2, 4, 71, and 142, adding up to 220, in turn, the divisors of 220 add up to 284, making the two a pair of amicable numbers.
  • 284 equals the sum of the squares of the digits of its own square in base 15. This property is shared with 1, 159, 264, 306 and 387.
  • There is no answer to the equation φ(x) = 284, making 284 a nontotient.

Here’s Q Drop #284: https://qalerts.app/?q=%23284

See you tomorrow, Frens 🤓