Checking, the default setup for DOSBox-X gives you

C:\>mem

Memory Type         Total      Used       Free
----------------  --------   --------   --------
Conventional          640K        32K       608K
Upper                  80K         0K        80K
Reserved              304K       304K         0K
Extended (XMS)     15,360K       448K    14,912K
----------------  --------   --------   --------
Total memory       16,384K       784K    15,600K

Total under 1 MB      720K        32K       688K

Total Expanded (EMS)                   15M (15,269,888 bytes)
Free Expanded (EMS)                    15M (15,269,888 bytes)

Largest executable program size       608K (622,272 bytes)
Largest free upper memory block        80K ( 81,920 bytes)
MS-DOS is resident in the high memory area.

I have to use loadfix to get some things to run, because they're surprised at being so low in memory...