5 . i s 9720 a p e r f e c t c u b e ? I f n o t f i n d t h e s m a l l e s t n u m b e r b y w h i c h i t s h o u l d b e d i v i d e d t o g e t a p e r f e c t c u b e . Share with your friends Share 0 Varun Rawat answered this The prime factorisation of 9720 is,9720 = 2×2×2×3×3×3×3×3×5Since, the prime factor 3 and 5 do not come in the group of 3, so 9720 is not a perfect cube.In order to make 9720 a perfect cube, it must be divided by 45.Now, 9720 ÷ 45 = 216 a perfect cubeNow, 2163 = 2×2×2×3×3×33 = 2 × 3 = 6 2 View Full Answer Neha answered this The Prime Factorization is: 2 x 2 x 2 x 3 x 3 x 3 x 3 x 3 x 5 In Exponential Form: 23 x 35 x 51 The number to be divided is 5 Thus,5 is the smallest number to be divided to make 9720 a perfect cube 0