20804560

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{97}}^1\times {\mathrm{383}}^1$

素因数の和:500

約数の個数: 80

約数和(自身を含む): 55996416

約数和(自身を除く): 35191856

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 97, 112, 140, 194, 280, 383, 388, 485, 560, 679, 766, 776, 970, 1358, 1532, 1552, 1915, 1940, 2681, 2716, 3064, 3395, 3830, 3880, 5362, 5432, 6128, 6790, 7660, 7760, 10724, 10864, 13405, 13580, 15320, 21448, 26810, 27160, 30640, 37151, 42896, 53620, 54320, 74302, 107240, 148604, 185755, 214480, 260057, 297208, 371510, 520114, 594416, 743020, 1040228, 1300285, 1486040, 2080456, 2600570, 2972080, 4160912, 5201140, 10402280, 20804560]

約数ペア:

[(1, 20804560), (2, 10402280), (4, 5201140), (5, 4160912), (7, 2972080), (8, 2600570), (10, 2080456), (14, 1486040), (16, 1300285), (20, 1040228), (28, 743020), (35, 594416), (40, 520114), (56, 371510), (70, 297208), (80, 260057), (97, 214480), (112, 185755), (140, 148604), (194, 107240), (280, 74302), (383, 54320), (388, 53620), (485, 42896), (560, 37151), (679, 30640), (766, 27160), (776, 26810), (970, 21448), (1358, 15320), (1532, 13580), (1552, 13405), (1915, 10864), (1940, 10724), (2681, 7760), (2716, 7660), (3064, 6790), (3395, 6128), (3830, 5432), (3880, 5362)]