21000824560

素因数分解:

$2^4\times 5^1\times {\mathrm{17551}}^1\times {\mathrm{14957}}^1$

素因数の和:32521

約数の個数: 40

約数和(自身を含む): 48832963776

約数和(自身を除く): 27832139216

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 14957, 17551, 29914, 35102, 59828, 70204, 74785, 87755, 119656, 140408, 149570, 175510, 239312, 280816, 299140, 351020, 598280, 702040, 1196560, 1404080, 262510307, 525020614, 1050041228, 1312551535, 2100082456, 2625103070, 4200164912, 5250206140, 10500412280, 21000824560]

約数ペア:

[(1, 21000824560), (2, 10500412280), (4, 5250206140), (5, 4200164912), (8, 2625103070), (10, 2100082456), (16, 1312551535), (20, 1050041228), (40, 525020614), (80, 262510307), (14957, 1404080), (17551, 1196560), (29914, 702040), (35102, 598280), (59828, 351020), (70204, 299140), (74785, 280816), (87755, 239312), (119656, 175510), (140408, 149570)]