2: 2
3: 3
4: 2
5: 5
6: 2, 3
7: 7
8: 2
9: 3
10: 2, 5
11: 11
12: 2, 3
13: 13
14: 2, 7
15: 3, 5
16: 2
17: 17
18: 2, 3
19: 19
20: 2, 5
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The prime factors of 20 are 2, 2, and 5.
The prime factors of 20 are: 2 and 5.
The prime factors of 20 are 2 and 5. The prime factors of 30 are 2, 3 and 5.
The prime factors of 20 are: 2 and 5.
Well say the number was 10 you find the factors (1,2,5,10) then out of those numbers you pick the prime number/s 2 and 10. For 20 , the factors are 1,2,4,5,10 and 20 so the prime factors are 2, and 5 again