20691567

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{101}}^1\times {\mathrm{103}}^1$

素因数の和:240

約数の個数: 48

約数和(自身を含む): 34751808

約数和(自身を除く): 14060241

約数列:

[1, 3, 9, 13, 17, 39, 51, 101, 103, 117, 153, 221, 303, 309, 663, 909, 927, 1313, 1339, 1717, 1751, 1989, 3939, 4017, 5151, 5253, 10403, 11817, 12051, 15453, 15759, 22321, 22763, 31209, 66963, 68289, 93627, 135239, 176851, 200889, 204867, 405717, 530553, 1217151, 1591659, 2299063, 6897189, 20691567]

約数ペア:

[(1, 20691567), (3, 6897189), (9, 2299063), (13, 1591659), (17, 1217151), (39, 530553), (51, 405717), (101, 204867), (103, 200889), (117, 176851), (153, 135239), (221, 93627), (303, 68289), (309, 66963), (663, 31209), (909, 22763), (927, 22321), (1313, 15759), (1339, 15453), (1717, 12051), (1751, 11817), (1989, 10403), (3939, 5253), (4017, 5151)]