Any multiple of 780.
The common multiples of 6 and 13 are the infinite set of multiples of their LCM, which is 78. So the common multiples of 6 and 13 are 78, 156, 234, 312, 390, and so on.
Multiples of 4 are 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52... Multiples of 13 are 13, 26, 39, 52, 65, 78, 91, 104... Common multiples of 4 and 13 are 52, 104, 156...
There is an infinite number of common multiples for 26 and 24. A common multiple of any two or more numbers is any number into which each of two or more numbers can be divided evenly (zero remainder). However, the least or lowest common multiple of 26 and 24 is 312.
78 and any of its multiples
The number of multiples is infinite, starting with: 78, 156, 234, 312, 390, 468, 546, 624, 702 +78 . . .
Multiples of 26 include 26, 52, 78 and 104. For them to be common, they need to be compared to another set of multiples.
Any multiple of 312
The greatest common factor of 12 and 78 is 6.
39, 78, 117.
The greatest common factor of 12 and 78 is 6.
There is not a least common multiple of a single number, such as 78, because there cannot be a least common multiple without two or more numbers to compare. Common multiples are multiples that the numbers being compared have in common. The least common multiple is the smallest multiple that all the numbers being compared have in common. Examples: The least common multiple of 18 and 78 is 234. The least common multiple of 52 and 78 is 156. The least common multiple of 78 and 195 is 390.
The greatest common factor of 99, 78, and 12 is 3.