22 has four divisors (also called factors): 1, 2, 11, 22.
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All numbers have divisors. Some numbers have some of the same divisors as other numbers. These are called common divisors. 3 is a divisor of 9. 3 is a divisor of 12. 3 is a common divisor of 9 and 12.
2. That is the only one. And the 11 divisors are 2k where k = 0, 1, ,2, ... , 10
The divisors of 97 are: 1, 97.
The divisors of 145 are 1, 5, 29, 145.