20856781680

素因数分解:

$2^4\times 3^1\times 5^1\times 7^1\times {\mathrm{12414751}}^1$

素因数の和:12414774

約数の個数: 80

約数和(自身を含む): 73892603904

約数和(自身を除く): 53035822224

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 35, 40, 42, 48, 56, 60, 70, 80, 84, 105, 112, 120, 140, 168, 210, 240, 280, 336, 420, 560, 840, 1680, 12414751, 24829502, 37244253, 49659004, 62073755, 74488506, 86903257, 99318008, 124147510, 148977012, 173806514, 186221265, 198636016, 248295020, 260709771, 297954024, 347613028, 372442530, 434516285, 496590040, 521419542, 595908048, 695226056, 744885060, 869032570, 993180080, 1042839084, 1303548855, 1390452112, 1489770120, 1738065140, 2085678168, 2607097710, 2979540240, 3476130280, 4171356336, 5214195420, 6952260560, 10428390840, 20856781680]

約数ペア:

[(1, 20856781680), (2, 10428390840), (3, 6952260560), (4, 5214195420), (5, 4171356336), (6, 3476130280), (7, 2979540240), (8, 2607097710), (10, 2085678168), (12, 1738065140), (14, 1489770120), (15, 1390452112), (16, 1303548855), (20, 1042839084), (21, 993180080), (24, 869032570), (28, 744885060), (30, 695226056), (35, 595908048), (40, 521419542), (42, 496590040), (48, 434516285), (56, 372442530), (60, 347613028), (70, 297954024), (80, 260709771), (84, 248295020), (105, 198636016), (112, 186221265), (120, 173806514), (140, 148977012), (168, 124147510), (210, 99318008), (240, 86903257), (280, 74488506), (336, 62073755), (420, 49659004), (560, 37244253), (840, 24829502), (1680, 12414751)]