### Common factors of 20 and 24

The common factors of 20 and 24 are 1, 2, 4.
To find the common factors of 20 and 24, we can list the factors of each number:
The factors of 20 are: 1, 2, 4, 5, 10, and 20.
The factors of 24 are: 1, 2, 3, 4, 6, 8, 12, and 24.
The common factors of 20 and 24 are the numbers that appear in both lists, which are 1, 2, and 4. These are the factors that both 20 and 24 share.

### Factors of 38

The factors of 38 are 1, 2, 19, and 38.
To find the factors of 38, we can divide 38 by each number from 1 to 38 and see which ones divide evenly, without a remainder. The factors of 38 are all the numbers that divide 38 evenly.
1 is a factor of 38 because 38 divided by 1 equals 38.
2 is a factor of 38 because 38 divided by 2 equals 19.
19 is a factor of 38 because 38 divided by 19 equals 2.
38 is a factor of 38 because 38 divided by 38 equals 1.
Therefore, the factors of 38 are 1, 2, 19, and 38.

### Factors of 74

The factors of 74 are 1, 2, 37, and 74.
To find the factors of 74, we can divide 74 by each number from 1 to 74 and see which ones divide evenly, without a remainder. The factors of 74 are all the numbers that divide 74 evenly.
1 is a factor of 74 because 74 divided by 1 equals 74.
2 is a factor of 74 because 74 divided by 2 equals 37.
37 is a factor of 74 because 74 divided by 37 equals 2.
74 is a factor of 74 because 74 divided by 74 equals 1.
Therefore, the factors of 74 are 1, 2, 37, and 74.

### Factors of 250

The factors of 250 are 1, 2, 5, 10, 25, 50, 125, and 250.
To find the factors of 250, we can divide 250 by each number from 1 to 250 and see which ones divide evenly, without a remainder. The factors of 250 are all the numbers that divide 250 evenly.
1 is a factor of 250 because 250 divided by 1 equals 250.
2 is a factor of 250 because 250 divided by 2 equals 125.
5 is a factor of 250 because 250 divided by 5 equals 50.
10 is a factor of 250 because 250 divided by 10 equals 25.
25 is a factor of 250 because 250 divided by 25 equals 10.
50 is a factor of 250 because 250 divided by 50 equals 5.
125 is a factor of 250 because 250 divided by 125 equals 2.
250 is a factor of 250 because 250 divided by 250 equals 1.
Therefore, the factors of 250 are 1, 2, 5, 10, 25, 50, 125, and 250.

### Factors of 294

The factors of 294 are 1, 2, 3, 6, 7, 14, 21, 42, 49, 98, 147, and 294.
To find the factors of 294, we can divide 294 by each number from 1 to 294 and see which ones divide evenly, without a remainder. The factors of 294 are all the numbers that divide 294 evenly.
1 is a factor of 294 because 294 divided by 1 equals 294.
2 is a factor of 294 because 294 divided by 2 equals 147.
3 is a factor of 294 because 294 divided by 3 equals 98.
6 is a factor of 294 because 294 divided by 6 equals 49.
7 is a factor of 294 because 294 divided by 7 equals 42.
14 is a factor of 294 because 294 divided by 14 equals 21.
21 is a factor of 294 because 294 divided by 21 equals 14.
42 is a factor of 294 because 294 divided by 42 equals 7.
49 is a factor of 294 because 294 divided by 49 equals 6.
98 is a factor of 294 because 294 divided by 98 equals 3.
147 is a factor of 294 because 294 divided by 147 equals 2.
294 is a factor of 294 because 294 divided by 294 equals 1.
Therefore, the factors of 294 are 1, 2, 3, 6, 7, 14, 21, 42, 49, 98, 147, and 294.

### Factors of 324

The factors of 324 are 1, 2, 3, 4, 6, 9, 12, 18, 27, 36, 54, 81, 108, 162, and 324.
To find the factors of 324, we can divide 324 by each number from 1 to 324 and see which ones divide evenly, without a remainder. The factors of 324 are all the numbers that divide 324 evenly.
1 is a factor of 324 because 324 divided by 1 equals 324.
2 is a factor of 324 because 324 divided by 2 equals 162.
3 is a factor of 324 because 324 divided by 3 equals 108.
4 is a factor of 324 because 324 divided by 4 equals 81.
6 is a factor of 324 because 324 divided by 6 equals 54.
9 is a factor of 324 because 324 divided by 9 equals 36.
12 is a factor of 324 because 324 divided by 12 equals 27.
18 is a factor of 324 because 324 divided by 18 equals 18.
27 is a factor of 324 because 324 divided by 27 equals 12.
36 is a factor of 324 because 324 divided by 36 equals 9.
54 is a factor of 324 because 324 divided by 54 equals 6.
81 is a factor of 324 because 324 divided by 81 equals 4.
108 is a factor of 324 because 324 divided by 108 equals 3.
162 is a factor of 324 because 324 divided by 162 equals 2.
324 is a factor of 324 because 324 divided by 324 equals 1.
Therefore, the factors of 324 are 1, 2, 3, 4, 6, 9, 12, 18, 27, 36, 54, 81, 108, 162, and 324.