The greatest common factor of 1628 , 40 = 4
1260
No, 3 is a factor of 9.
No, 9 is a factor of 36.
No, 9 is a factor of 63.
The GCF is 9. The LCM is 180. Check it. 36 x 45 = 1620 180 x 9 = 1620 It checks.
9
The GCF is 540.
1620
9
180 x 9 = 1620
1,2,3,5 (Hint google "factor calculator")
1620
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
The greatest common factor of 1628 , 40 = 4
Yes, 1620 is divisible by all of the given numbers
GCD: 18 LCM: 1620