You need at least two numbers to find something in common between them.
There is an infinite number of common multiples for 13 and 17. A common multiple of any two numbers is any number into which each of two or more number can be divided with zero remainder.
There is an infinite number of common multiples for 13 and 22. A common multiple of any two numbers is any number into which each of two or more numbers can be divided evenly (zero remainder).
There is an infinite number of common multiples for 13 and 18. A common multiple of any two numbers is any number into which each of two or more numbers can be divided evenly (zero remainder).
65, 130
Multiples of 13 include 13, 26, 39 and so on. For them to be common, they need to be compared to another set of multiples.
On some least common multiples, like this question here, there are no common multiples until you multiply the two numbers together, 40 x 13 = 520.
There is an infinite number of common multiples for 13 and 81. 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 13 and 81 is 1,053.
The least common multiples of 5, 11, and 13 is 715.
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.
78 and any of its multiples
The LCM of 9 and 13 is 117. Other common multiples include 234 and 351.
The list would be endless because there is an infinite number of common multiples for 21 and 13. 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 leastor lowest common multiple (LCM) of 21 and 13 is 273.