[{"_id":1,"name":"Growth Lead Momentum","factors":[{factorId:"C24",index:0,weight:1},{factorId:"D74",index:7,weight:9}]}]

db.collection.aggregate([{$unwind:"$factors"},{$project:{_id:1,name:1,factorId:"$factors.factorId",index:"$factors.index",weight:"$factors.weight"}}])