20128563

素因数分解:

$3^2\times 7^2\times {\mathrm{13}}^1\times {\mathrm{3511}}^1$

素因数の和:3544

約数の個数: 36

約数和(自身を含む): 36433488

約数和(自身を除く): 16304925

約数列:

[1, 3, 7, 9, 13, 21, 39, 49, 63, 91, 117, 147, 273, 441, 637, 819, 1911, 3511, 5733, 10533, 24577, 31599, 45643, 73731, 136929, 172039, 221193, 319501, 410787, 516117, 958503, 1548351, 2236507, 2875509, 6709521, 20128563]

約数ペア:

[(1, 20128563), (3, 6709521), (7, 2875509), (9, 2236507), (13, 1548351), (21, 958503), (39, 516117), (49, 410787), (63, 319501), (91, 221193), (117, 172039), (147, 136929), (273, 73731), (441, 45643), (637, 31599), (819, 24577), (1911, 10533), (3511, 5733)]