6137440

Appears in sequences

• Numbers k that divide sigma(k)-phi(k).at n=8A055681
• Numbers k such that sigma(k)-2*k = phi(k): abundance of k equals Eulerphi of k.at n=3A088826
• Composite numbers n such that if x = sigma(n)-phi(n)-n then n = sigma(x)-phi(x)-x.at n=13A238225
• Numbers k such that A051709(k)/A173557(k) is a positive natural number and a divisor of k.at n=43A344995