What term is used to describe numbers with the property that the sum of all factors of the number including 1 and the number itself is less than twice the number?
Answer:
Deficient Number
- If we consider the number 10, its factors are: 1, 2, 5, 10. The sum of its factors is 1 + 2 + 5 + 10 = 18.
- We can see that the sum of all factors is less than twice the number itself, i.e. 2 × 10 = 20.
- Such numbers, whose sum of all factors, including 1 and the number itself is less than twice the number are called deficient numbers.