23,783,748 <- Least Common Multiple (used an online calculator

)
LCM(m,n) = (m*n)/GCD(m,n)
We have 5 numbers, 6, 23, 37, 68, 137 which can be broken down into:
LCM(6,23) = 138 / 1 = 138
LCM(138, 37) = 5106 / 1 = 5106
LCM(5106, 68) = 347208 / 2 = 173604
LCM(173604, 137) = 23783748 / 1 = 23783748
so LCM(6,23,37,68,137) = 23,783,748
GCD calculation is pretty simple too