Well this is a very tricky question
If you mean a number that they can all go into . The smallest would be
prime factorization helps 9 = 3 x 3 81= 3 x3x3x3 27 = 3x3x3
largest number of 3's is 3 to the 4th exponent which would equal 81. They can all go into 81 to find the next number multiply by 3 again and so on.
1, 3 and 9 are common factors of 27, 45 and 81. 27, 45 and 81 are multiples of 1, 3 and 9.
The multiples of 81 are infinite. The factors of 81 are: 1, 3, 9, 27, 81.
Multiples are formed by multiplying a number by successive counting numbers. The multiples of 9 are 9, 18, 27, 36, 45, 54, 63, 72, 81, 90, 99 and so on.
9, 18, 27, 36, 45, 54, 63, 72, 81, 90, 99, 108 . . .
9, 18, 27, 36, 45, 54, 63, 72, 81, 90, 99.
1, 3 and 9 are common factors of 27, 45 and 81. 27, 45 and 81 are multiples of 1, 3 and 9.
Oh, what a happy little question! Multiples of 27 include 27, 54, 81, and so on. Multiples of 9 include 9, 18, 27, and more. Multiples of 15 are 15, 30, 45, and beyond. And multiples of 81 include 81, 162, 243, and many more. Just remember, each number has its own special multiples waiting to be discovered!
The multiples of 243 is 1, 3, 9, 27, 81, and 243.
The multiples of 81 are infinite. The factors of 81 are: 1, 3, 9, 27, 81.
Multiples of 9: 9, 18, 27, 36, 45, 54, 63, 72, 81, 90.
The Multiples of 27: 27, 54, 81, 108, 135, .... Factors of 27: 1, 3, 9, 27 and 35. (27 = 33)
They are all multiples of 9. Their common multiples are 405, 810, 1215 and so on.
The multiples of nine are infinite, starting with these: 9, 18, 27, 36, 45, 54, 63, 72, 81, 90 +9 . . .
They are multiples of 1, 3 and 9.
1, 9, and 81 are the only multiples of 81
9, 18, 27, 36, 45, 54, 63, 72, 81.
9, 18, 27, 36, 45, 54, 63, 72, 81, 90, 99, 108Multiples of 27 in bold.