28262120

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{907}}^1$

素因数の和:978

約数の個数: 64

約数和(自身を含む): 68644800

約数和(自身を除く): 40382680

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 41, 76, 82, 95, 152, 164, 190, 205, 328, 380, 410, 760, 779, 820, 907, 1558, 1640, 1814, 3116, 3628, 3895, 4535, 6232, 7256, 7790, 9070, 15580, 17233, 18140, 31160, 34466, 36280, 37187, 68932, 74374, 86165, 137864, 148748, 172330, 185935, 297496, 344660, 371870, 689320, 706553, 743740, 1413106, 1487480, 2826212, 3532765, 5652424, 7065530, 14131060, 28262120]

約数ペア:

[(1, 28262120), (2, 14131060), (4, 7065530), (5, 5652424), (8, 3532765), (10, 2826212), (19, 1487480), (20, 1413106), (38, 743740), (40, 706553), (41, 689320), (76, 371870), (82, 344660), (95, 297496), (152, 185935), (164, 172330), (190, 148748), (205, 137864), (328, 86165), (380, 74374), (410, 68932), (760, 37187), (779, 36280), (820, 34466), (907, 31160), (1558, 18140), (1640, 17233), (1814, 15580), (3116, 9070), (3628, 7790), (3895, 7256), (4535, 6232)]