The Sun volume is about 1,418,364,847.22 billion cubic km, Jupiter is 1,530,600.9 billion cubic km = 926 Jupiters.
Approximate values. Mercury - 21,254,000 Venus - 1,443,000 Earth - 1,260,000 - Moon - 71,991,000 Mars - 9,000,000 Jupiter - 908 Saturn - 1,481 Uranus - 19,249 Neptune - 21,254 - Pluto - 244,141,000
28 Uranus's can fit inside the Sun.
about 750,000
Arcturus is approximately 26 times larger than the Sun. So about 17,500 Suns will fit into it. See link for pictorial representation