22. 21 soni qaysi tub sonlarga bo'linadi?

To find the prime divisors of 21, we need to find prime numbers that divide 21 evenly.

1. The number 1 is not a prime number.
2. 21 is not divisible by 2 (it's an odd number).
3. 21 is divisible by 3 (21 ÷ 3 = 7).
4. 21 is not divisible by 5.
5. 21 is divisible by 7 (21 ÷ 7 = 3).

The prime numbers that divide 21 are 3 and 7.

Ответ: 3 va 7