21891639

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{97}}^1\times {\mathrm{977}}^1$

素因数の和:1095

約数の個数: 32

約数和(自身を含む): 36804096

約数和(自身を除く): 14912457

約数列:

[1, 3, 7, 11, 21, 33, 77, 97, 231, 291, 679, 977, 1067, 2037, 2931, 3201, 6839, 7469, 10747, 20517, 22407, 32241, 75229, 94769, 225687, 284307, 663383, 1042459, 1990149, 3127377, 7297213, 21891639]

約数ペア:

[(1, 21891639), (3, 7297213), (7, 3127377), (11, 1990149), (21, 1042459), (33, 663383), (77, 284307), (97, 225687), (231, 94769), (291, 75229), (679, 32241), (977, 22407), (1067, 20517), (2037, 10747), (2931, 7469), (3201, 6839)]