Toán Lớp 6: ƯỚC (2020) giúp e ạ e ngu toán nên ko biết

Question

Toán Lớp 6:  ƯỚC (2020) giúp e ạ e ngu toán nên ko biết

thanhtung · Answer

Ph&acirc;n t&iacute;ch   2020=1.2^2. 5.101   => Ư(2020)={1;2;5;101;4;20;10;202;505;2020;-1;-2;-5;-101;-4;-20;-10;-202;-505;-2020}

minhhaanh · Answer

2020=2.2.5.101=2^{2}.5.101   Ư(2020)={1;2;4;5;10;20;101;2020;1010;505;202}   --   Giải th&iacute;ch c&aacute;c ước:   2020:1=2020   &rarr;2020 vdots1 v&agrave; 2020 vdots2020   &rarr;1 v&agrave; 2020&isin;Ư(2020)   2020:2=1010   &rarr;2020 vdots2 v&agrave; 2020 vdots1010   &rarr;2 v&agrave; 1010&isin;Ư(2020)   2020:2^2&rarr;2020:4=505   &rarr;2020 vdots4 v&agrave; 2020 vdots505   &rarr;4 v&agrave; 505&isin;Ư(2020)   2020:5=404   &rarr;2020 vdots5 v&agrave; 2020 vdots404   &rarr;5 v&agrave; 404&isin;Ư(2020)   2020:(5.2)&rarr;2020:10=202   &rarr;2020 vdots10 v&agrave; 2020 vdots202   &rarr;10 v&agrave; 202&isin;Ư(2020)   2020:101=20   &rarr;2020 vdots101 v&agrave; 2020 vdots20   &rarr;101 v&agrave; 20&isin;Ư(2020)