How to get rows that have specific sourctype only when group by givenp

I work on sql server 2014 i need to get rows that have source type 484456

when group by two columns group by GivenPartNumber_Non and vcompanyid

so i need to make select query display every group of rows by GivenPartNumber_Non and

vcompanyid have source type 484456 only may be this group one row or 2rows or 3 rows or

more etc any way i need to retrieve it .

sample data

create table #notmappedsources
(
GivenPartNumber_Non varchar(200),
vcompanyid  int,
SourceType int
)
insert into #notmappedsources(GivenPartNumber_Non,vcompanyid,SourceType)
values
('ADFGH22',1233,484456),
('ADFGH22',1233,484456),
('ADFGH22',1233,484456),('XFDY990',5489,484456),
('XFDY990',5489,484456),('GX84322',2549,484456),('LKHG23',3201,484320),
('LKHG23',3201,484320),
('LKHG23',3201,484320),('DGHJ66',7041,484320),('FDYH36',8901,484320),
('FDYH36',8901,484320),('MNH32',5601,489561),
('MNH32',5601,489561),
('MNH32',5601,484456),('NUI34',9076,489561),('KLMD33',5022,489561),
('KLMD33',5022,484456)

what i try as below :

select GivenPartNumber_Non,vcompanyid from #notmappedsources
where SourceType=484456
group by GivenPartNumber_Non,vcompanyid

expected result as below :