It is.
By the traditional chart:
#10 is worth 1300.
#13 and #47 together are worth 1580. If the Chargers offered you that, you take it.
You get three top-50 picks, including #13. You could do very interesting things with #44 and #47, like say move back up into the back half of the 1st round. In theory, those two picks together could get you up to #19. Or you could trade one of those with the 3rd-rounder to get into the high 20s.
The Chargers would more likely offer their 3rd. #13 and #77 total 1355.