21113199

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{47}}^1\times {\mathrm{71}}^1$

素因数の和:180

約数の個数: 48

約数和(自身を含む): 34145280

約数和(自身を除く): 13032081

約数列:

[1, 3, 9, 19, 37, 47, 57, 71, 111, 141, 171, 213, 333, 423, 639, 703, 893, 1349, 1739, 2109, 2627, 2679, 3337, 4047, 5217, 6327, 7881, 8037, 10011, 12141, 15651, 23643, 30033, 33041, 49913, 63403, 99123, 123469, 149739, 190209, 297369, 370407, 449217, 570627, 1111221, 2345911, 7037733, 21113199]

約数ペア:

[(1, 21113199), (3, 7037733), (9, 2345911), (19, 1111221), (37, 570627), (47, 449217), (57, 370407), (71, 297369), (111, 190209), (141, 149739), (171, 123469), (213, 99123), (333, 63403), (423, 49913), (639, 33041), (703, 30033), (893, 23643), (1349, 15651), (1739, 12141), (2109, 10011), (2627, 8037), (2679, 7881), (3337, 6327), (4047, 5217)]