Group by multiple columns and sum other multiple columns

Question

I have a data frame with about 200 columns, out of them I want to group the table by first 10 or so which are factors and sum the rest of the columns.

I have list of

Answer 1

Another way to do this with dplyr that would be generic (don't need list of columns) would be:

df %>% group_by_if(is.factor) %>% summarize_if(is.numeric,sum,na.rm = TRUE)