20196855

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{97}}^1\times {\mathrm{661}}^1$

素因数の和:776

約数の個数: 48

約数和(自身を含む): 40482624

約数和(自身を除く): 20285769

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 97, 105, 291, 315, 485, 661, 679, 873, 1455, 1983, 2037, 3305, 3395, 4365, 4627, 5949, 6111, 9915, 10185, 13881, 23135, 29745, 30555, 41643, 64117, 69405, 192351, 208215, 320585, 448819, 577053, 961755, 1346457, 2244095, 2885265, 4039371, 6732285, 20196855]

約数ペア:

[(1, 20196855), (3, 6732285), (5, 4039371), (7, 2885265), (9, 2244095), (15, 1346457), (21, 961755), (35, 577053), (45, 448819), (63, 320585), (97, 208215), (105, 192351), (291, 69405), (315, 64117), (485, 41643), (661, 30555), (679, 29745), (873, 23135), (1455, 13881), (1983, 10185), (2037, 9915), (3305, 6111), (3395, 5949), (4365, 4627)]