The factors for 80 are: 10, 8, 40, 2, 20, 4, 1, 80, 16 and 5.
Since 40 is a factor of 80, all of its factors are common.
The sum is 1 plus 5 = 6
Composite factors of 80 : 4, 8, 10, 16, 20, 40, 80 Factors of 80: 1, 2, 4, 5, 8, 10, 16, 20, 40, 80
1 2 4 8 16 are all common factors
The factors of 80 are: 1, 2, 4, 5, 8, 10, 16, 20, 40, 80.
Common factors of 72 and 80 are: 1, 2, 4, and 8.
factors of 80: 1, 2, 4, 5, 8, 10, 16, 20, 40, and 80.
Since 80 is a factor of 160, all of its factors are common.
Since 40 is a factor of 80, all of its factors are common.
We won't be able to find factors of 80 that are not factors of 80. The factors of 80 that aren't factors of 42 are 4, 5, 8, 10, 16, 20, 40 and 80.
4, 8, 10, 16, 20, 40, 80
1,2,4,8 & 16.
1 and 2
1, 2, 4, 5, 8, 10, 16, 20, 40, 80
Since 20 is a factor of 80, all of its factors are common.
All numbers have factors. Some numbers have some of the same factors as other numbers. Multiples of numbers have all of the factors of numbers that are factors of them, plus some of their own. 32 is a multiple of 16 and will have all of its factors. 64 is a multiple of both 32 and 16 and will have all of their factors.
The common factors are: 1, 2, 4, 8, 16.