1, 13, 17, and 221.
factor pair = 1512,1 factor pair = 756,2 factor pair = 504,3 factor pair = 378,4 factor pair = 252,6 factor pair = 216,7 factor pair = 189,8 factor pair = 168,9 factor pair = 126,12 factor pair = 108,14 factor pair = 84,18 factor pair = 72,21 factor pair = 63,24 factor pair = 56,27 factor pair = 54,28 factor pair = 42,36
The greatest common factor of 494 and 221 is 13.
Use a factor tree. 221 13,17 All the factors are prime. 13 x 17 = 221
No. 221 = 13 x 17
No.
factor pair = 650,1 factor pair = 325,2 factor pair = 130,5 factor pair = 65,10 factor pair = 50,13 factor pair = 26,25
factor pair = 36,1 factor pair = 18,2 factor pair = 12,3 factor pair = 9,4 factor pair = 6,6
factor pair = 90,1 factor pair = 45,2 factor pair = 30,3 factor pair = 18,5 factor pair = 15,6 factor pair = 10,9 Doctor Chuck Mathdoc
factor pair = 76,1 factor pair = 38,2 factor pair = 19,4
13
13 and 17