The following pages link to On a problem of Nicol and Zhang (Q958672):
Displaying 4 items.
- On the classification of integers \(n\) that divide \(\varphi(n)+\sigma(n)\) (Q1026879) (← links)
- On a new generalization of a theorem of L. E. Dickson. (Q1119675) (← links)
- The Nicol numbers which have five different prime divisors (Q2916773) (← links)
- The 4-Nicol numbers having five different prime divisors (Q3093765) (← links)