20561008

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{2411}}^1$

素因数の和:2473

約数の個数: 40

約数和(自身を含む): 43965936

約数和(自身を除く): 23404928

約数列:

[1, 2, 4, 8, 13, 16, 26, 41, 52, 82, 104, 164, 208, 328, 533, 656, 1066, 2132, 2411, 4264, 4822, 8528, 9644, 19288, 31343, 38576, 62686, 98851, 125372, 197702, 250744, 395404, 501488, 790808, 1285063, 1581616, 2570126, 5140252, 10280504, 20561008]

約数ペア:

[(1, 20561008), (2, 10280504), (4, 5140252), (8, 2570126), (13, 1581616), (16, 1285063), (26, 790808), (41, 501488), (52, 395404), (82, 250744), (104, 197702), (164, 125372), (208, 98851), (328, 62686), (533, 38576), (656, 31343), (1066, 19288), (2132, 9644), (2411, 8528), (4264, 4822)]