20512991555

素因数分解:

$5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{911}}^1\times {\mathrm{20753}}^1$

素因数の和:21707

約数の個数: 32

約数和(自身を含む): 29072867328

約数和(自身を除く): 8559875773

約数列:

[1, 5, 7, 31, 35, 155, 217, 911, 1085, 4555, 6377, 20753, 28241, 31885, 103765, 141205, 145271, 197687, 643343, 726355, 988435, 3216715, 4503401, 18905983, 22517005, 94529915, 132341881, 586085473, 661709405, 2930427365, 4102598311, 20512991555]

約数ペア:

[(1, 20512991555), (5, 4102598311), (7, 2930427365), (31, 661709405), (35, 586085473), (155, 132341881), (217, 94529915), (911, 22517005), (1085, 18905983), (4555, 4503401), (6377, 3216715), (20753, 988435), (28241, 726355), (31885, 643343), (103765, 197687), (141205, 145271)]