Three numbers1400, 1960 and n have a G.C.D and L.C.M of 70 and 22 X 52 x 72 x 11 respectively. Find the least possible value of n?

The question is wrong. 5 is a common factor of 1400 and 1960. However, 5 is not a common factor of the LCM. This is impossible.

Three numbers 1400, 1960 and n have a G.C.D and L.C.M of 70 and 22 X 52 x 72 x 11 respectively.
Find the least possible value of n?
70 x 20, 70 x 28, n
22 × 52 × 72 × 11 = 906048
Looks the problem contains a typo.