In mathematics, a natural number a is a unitary divisor (or Hall divisor) of a number b if a is a divisor of b and if a and b a {\displaystyle {\frac...

In mathematics, a divisor of an integer n , {\displaystyle n,} also called a factor of n , {\displaystyle n,} is an integer m {\displaystyle m} that may...

sum of its positive proper unitary divisors, not including the number itself (a divisor d of a number n is a unitary divisor if d and n/d share no common...

divisors. (A divisor d of a number n is a unitary divisor if d and n/d share no common factors.). A unitary multiply perfect number is simply a unitary multi...

Look up unitary in Wiktionary, the free dictionary. Unitary may refer to: Unitary divisor Unitary element Unitary group Unitary matrix Unitary morphism...

In mathematics, the greatest common divisor (GCD) of two or more integers, which are not all zero, is the largest positive integer that divides each of...

that a m = 1 mod c {\displaystyle am=1{\bmod {c}}} , and for each unitary divisor d {\displaystyle d} of N − 1 {\displaystyle N-1} let e = N − 1 d {\displaystyle...

number theory, a divisor function is an arithmetic function related to the divisors of an integer. When referred to as the divisor function, it counts...

evenly. Every natural number has both 1 and itself as a divisor. If it has any other divisor, it cannot be prime. This leads to an equivalent definition...

harmonic divisor number or Ore number is a positive integer whose divisors have a harmonic mean that is an integer. The first few harmonic divisor numbers...