When you have many users in Artifactory, you can get all admins with a quick one liner using the REST API from Linux command line.
for name in \
$(curl -s -uadmin:password https://host/artifactory/api/security/users | jq ".[].name" | tr -d '"'); do \
echo \
"$name: $(curl -s -uadmin:password https://host/artifactory/api/security/users/$name | jq '.admin')"; \
done
Easy!