Refactorable number
A kind of number
About Refactorable number
A refactorable number (or tau number) is divisible by the count of its positive divisors. For example, 8 has divisors 1,2,4,8 (four divisors) and 8÷4=2.
Key features
- Also called "tau numbers" (τ(n) = number of divisors).
- 1, 2, 8, 9, 12, 18, 24, 36, 40, 56, 60, 72, 80, ….
Examples:
1, 2, 8, 9, 12, 18, 24, 36, 40, 56, 60, 72, 80