20516008

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{2473}}^1$

素因数の和:2557

約数の個数: 32

約数和(自身を含む): 41414760

約数和(自身を除く): 20898752

約数列:

[1, 2, 4, 8, 17, 34, 61, 68, 122, 136, 244, 488, 1037, 2074, 2473, 4148, 4946, 8296, 9892, 19784, 42041, 84082, 150853, 168164, 301706, 336328, 603412, 1206824, 2564501, 5129002, 10258004, 20516008]

約数ペア:

[(1, 20516008), (2, 10258004), (4, 5129002), (8, 2564501), (17, 1206824), (34, 603412), (61, 336328), (68, 301706), (122, 168164), (136, 150853), (244, 84082), (488, 42041), (1037, 19784), (2074, 9892), (2473, 8296), (4148, 4946)]