The sum is 144 if 60 is included, 84 if not.
The common factors are: 1, 2, 4.
all numbers that can divide 60 are the factors of 60: 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30 and 60
60, 72, 84, 90 and 96 all have 12 factors.
30 is the only number between 20 and 50 that is a factor of 60
Since 12 is a factor of 60, all the factors of 12 are factors of 60.
The composite factors of 60 are: 4, 6, 10, 12, 15, 20, 30, 60.
The factors of 60 that are not in 45 are 2, 4, 6, 10, 12, 20, 30 and 60
The even factors of 60 are: 2, 4, 6, 10, 12, 20, 30, 60.
All the factors of 30.
3, 4, 6, 12, 15, 20, 30, 60.
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Since 30 is a factor of 60, all the factors of 30 will be common to 60.
The factors of 60 are: 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60.
The factors of 60 are: 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60.
It has all the factors of 42 on one side and the factors of 60 in the other part with factors for both in the middle.
The sum is 144 if 60 is included, 84 if not.