1, 2 and 4
The common factors are: 1, 2, 5, 10 The Greatest Common Factor: 10
The LCM of 1620 and 104 is 42120
1620 is one.
1620
1,2,3,5 (Hint google "factor calculator")
The GCF is 9. The LCM is 180. Check it. 36 x 45 = 1620 180 x 9 = 1620 It checks.
The factors of 1620 are: 1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 45, 54, 60, 81, 90, 108, 135, 162, 180, 270, 324, 405, 540, 810, 1620
Any multiple of 3420.
GCD: 18 LCM: 1620
The greatest common factor of 1628 , 40 = 4
1620
The greatest common factor is the largest of the common factors.