20780008

素因数分解:

$2^3\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{2083}}^1$

素因数の和:2161

約数の個数: 32

約数和(自身を含む): 41263200

約数和(自身を除く): 20483192

約数列:

[1, 2, 4, 8, 29, 43, 58, 86, 116, 172, 232, 344, 1247, 2083, 2494, 4166, 4988, 8332, 9976, 16664, 60407, 89569, 120814, 179138, 241628, 358276, 483256, 716552, 2597501, 5195002, 10390004, 20780008]

約数ペア:

[(1, 20780008), (2, 10390004), (4, 5195002), (8, 2597501), (29, 716552), (43, 483256), (58, 358276), (86, 241628), (116, 179138), (172, 120814), (232, 89569), (344, 60407), (1247, 16664), (2083, 9976), (2494, 8332), (4166, 4988)]