What is the formula for GDP PPP in constant international $?

I am trying to reproduce this World Bank data.

I tried the following (for many countries other than the US):

GDP PPP in current dollars = (GDP_current_LCU)/(PPP_factor)

Then deflated the above by an index of US inflation, in this case with base 2021. Deflator is:

US_CPI_year_t/124.3

Final formula is: (GDP_current_LCU)/(PPP_factor)/(US_CPI_year_t/124.3)

Values are close but not the same. What am I doing wrong?