20978384

素因数分解:

$2^4\times 7^1\times {\mathrm{97}}^1\times {\mathrm{1931}}^1$

素因数の和:2043

約数の個数: 40

約数和(自身を含む): 46955328

約数和(自身を除く): 25976944

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 97, 112, 194, 388, 679, 776, 1358, 1552, 1931, 2716, 3862, 5432, 7724, 10864, 13517, 15448, 27034, 30896, 54068, 108136, 187307, 216272, 374614, 749228, 1311149, 1498456, 2622298, 2996912, 5244596, 10489192, 20978384]

約数ペア:

[(1, 20978384), (2, 10489192), (4, 5244596), (7, 2996912), (8, 2622298), (14, 1498456), (16, 1311149), (28, 749228), (56, 374614), (97, 216272), (112, 187307), (194, 108136), (388, 54068), (679, 30896), (776, 27034), (1358, 15448), (1552, 13517), (1931, 10864), (2716, 7724), (3862, 5432)]