Here is the sentence it was used in:
"Many doctors and patients are uncomfortable with the idea of having cost of care factor into end-of-life decisions."
I am confused with the sentence because I have checked a lot of dictionaries and found that "factor in" or "factor something into" apparently must take an object, but in the sentence it did not. At first, I thought that there was a mistake in the sentence, namely I thought "having" had been used there as a modal verb "have to". But as Stoney B put it in a comment "to have something do something" means to experience something.
So was "factor into" used as an intransitive verb there as is it correct to do so?