20880405

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{5099}}^1$

素因数の和:5130

約数の個数: 48

約数和(自身を含む): 44553600

約数和(自身を除く): 23673195

約数列:

[1, 3, 5, 7, 9, 13, 15, 21, 35, 39, 45, 63, 65, 91, 105, 117, 195, 273, 315, 455, 585, 819, 1365, 4095, 5099, 15297, 25495, 35693, 45891, 66287, 76485, 107079, 178465, 198861, 229455, 321237, 331435, 464009, 535395, 596583, 994305, 1392027, 1606185, 2320045, 2982915, 4176081, 6960135, 20880405]

約数ペア:

[(1, 20880405), (3, 6960135), (5, 4176081), (7, 2982915), (9, 2320045), (13, 1606185), (15, 1392027), (21, 994305), (35, 596583), (39, 535395), (45, 464009), (63, 331435), (65, 321237), (91, 229455), (105, 198861), (117, 178465), (195, 107079), (273, 76485), (315, 66287), (455, 45891), (585, 35693), (819, 25495), (1365, 15297), (4095, 5099)]