in how many ways can 2160 be resolved in two factors
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2160 =16*27*5
(2*2*2*2)(3*3*3)(5)
Number of factors of 2160 is (4+1)(3+1)(1+1)
=5*4*2=40
Out of 40 factors 2 factors can be selected in
C(40,2)=780 Ways
(2*2*2*2)(3*3*3)(5)
Number of factors of 2160 is (4+1)(3+1)(1+1)
=5*4*2=40
Out of 40 factors 2 factors can be selected in
C(40,2)=780 Ways
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