✦ 5 frontiers

read-only vieweressays

erdős #144

← #143 · #145 → (packet.json; erdosproblems.com)

The density of integers which have two divisors $d_{1}, d_{2}$ such that $d_{1} < d_{2} < 2 d_{1}$ exists and is equal to $1$ .

Worked, still open.

number theory · solved · prize $250 · 0 attempts

use this record

vela registry pull vfr_37aec80d874a0239

vela reproduce examples/erdos-problems

oeis

A005279 — Numbers having divisors d, e with d < e < 2*d.6,12,15,18,20,24,28,30,35,36,40,42,45,48,54,56,60,63,66,70,72,75,77,78,80,84,88,90,91,96,99,100,102,104,105,108,110,112,

links

Create a formalisation here · link

status

solved

finding.noted · reviewer:will-blair · 1 day

renders the record as of vev_d199cb2e · 1,338 events · hub