Question

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Answer 1

\(66 = 2.3.11\)                                                         

\(785 = 5.157\)

\(782 = 2.17.23\)

\(510 = 2.3.5.17\)

\(210 = 2.3.5.7\)                                                       

\(222 = 2.3.37\)

\(321 = 3.107\)                                                         

\(261 = 3^2 . 29\)

Answer 2

số 66 gồm 8 ước :1;2;3;6;11;22;33;66      số 101 gồm 2 ước:1;101

Answer 3

\(Ư\left(66\right)=\left\{1;2;3;6;66\right\}\)

\(Ư\left(101\right)=\left\{1;101\right\}\)

\(Ư\left(210\right)=\left\{1;2;3;5;6;7;10;21;210\right\}\)

\(Ư\left(321\right)=\left\{1;3;321\right\}\)

\(Ư\left(261\right)=\left\{1;3;9;261\right\}\)

\(Ư\left(785\right)=\left\{1;5;785\right\}\)

\(Ư\left(782\right)=\left\{1;2;17;23;46;34\right\}\)

\(Ư\left(761\right)=\left\{1;761\right\}\)

\(Ư\left(222\right)=\left\{1;2;3;6;74;37;111;222\right\}\)

\(Ư\left(510\right)=\left\{1;2;3;5;6;10;74;85;102;510\right\}\)

 

Answer 4

1: \(66=2\cdot3\cdot11\)

=>Có (1+1)*(1+1)*(1+1)=8(ước)

2: \(101=101\)

=>Có 2 ước

3: \(210=2\cdot3\cdot5\cdot7\)

=>Có (1+1)*(1+1)*(1+1)*(1+1)=16(ước)

4: \(321=3\cdot107\)

=>Có (1+1)*(1+1)=4 ước

5: \(261=3^2\cdot29\)

=>Có (1+1)*(2+1)=3*2=6 ước

6: \(785=5\cdot157\)

=>Có (1+1)*(1+1)=4 ước