638009548

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{137}}^1\times {\mathrm{1997}}^1$

素因数の和:2202

約数の個数: 48

約数和(自身を含む): 1250684064

約数和(自身を除く): 612674516

約数列:

[1, 2, 4, 11, 22, 44, 53, 106, 137, 212, 274, 548, 583, 1166, 1507, 1997, 2332, 3014, 3994, 6028, 7261, 7988, 14522, 21967, 29044, 43934, 79871, 87868, 105841, 159742, 211682, 273589, 319484, 423364, 547178, 1094356, 1164251, 2328502, 3009479, 4657004, 6018958, 12037916, 14500217, 29000434, 58000868, 159502387, 319004774, 638009548]

約数ペア:

[(1, 638009548), (2, 319004774), (4, 159502387), (11, 58000868), (22, 29000434), (44, 14500217), (53, 12037916), (106, 6018958), (137, 4657004), (212, 3009479), (274, 2328502), (548, 1164251), (583, 1094356), (1166, 547178), (1507, 423364), (1997, 319484), (2332, 273589), (3014, 211682), (3994, 159742), (6028, 105841), (7261, 87868), (7988, 79871), (14522, 43934), (21967, 29044)]