20378820

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{401}}^1$

素因数の和:442

約数の個数: 144

約数和(自身を含む): 71858304

約数和(自身を除く): 51479484

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 11, 12, 14, 15, 20, 21, 22, 28, 30, 33, 35, 42, 44, 55, 60, 66, 70, 77, 84, 105, 110, 121, 132, 140, 154, 165, 210, 220, 231, 242, 308, 330, 363, 385, 401, 420, 462, 484, 605, 660, 726, 770, 802, 847, 924, 1155, 1203, 1210, 1452, 1540, 1604, 1694, 1815, 2005, 2310, 2406, 2420, 2541, 2807, 3388, 3630, 4010, 4235, 4411, 4620, 4812, 5082, 5614, 6015, 7260, 8020, 8421, 8470, 8822, 10164, 11228, 12030, 12705, 13233, 14035, 16842, 16940, 17644, 22055, 24060, 25410, 26466, 28070, 30877, 33684, 42105, 44110, 48521, 50820, 52932, 56140, 61754, 66165, 84210, 88220, 92631, 97042, 123508, 132330, 145563, 154385, 168420, 185262, 194084, 242605, 264660, 291126, 308770, 339647, 370524, 463155, 485210, 582252, 617540, 679294, 727815, 926310, 970420, 1018941, 1358588, 1455630, 1698235, 1852620, 2037882, 2911260, 3396470, 4075764, 5094705, 6792940, 10189410, 20378820]

約数ペア:

[(1, 20378820), (2, 10189410), (3, 6792940), (4, 5094705), (5, 4075764), (6, 3396470), (7, 2911260), (10, 2037882), (11, 1852620), (12, 1698235), (14, 1455630), (15, 1358588), (20, 1018941), (21, 970420), (22, 926310), (28, 727815), (30, 679294), (33, 617540), (35, 582252), (42, 485210), (44, 463155), (55, 370524), (60, 339647), (66, 308770), (70, 291126), (77, 264660), (84, 242605), (105, 194084), (110, 185262), (121, 168420), (132, 154385), (140, 145563), (154, 132330), (165, 123508), (210, 97042), (220, 92631), (231, 88220), (242, 84210), (308, 66165), (330, 61754), (363, 56140), (385, 52932), (401, 50820), (420, 48521), (462, 44110), (484, 42105), (605, 33684), (660, 30877), (726, 28070), (770, 26466), (802, 25410), (847, 24060), (924, 22055), (1155, 17644), (1203, 16940), (1210, 16842), (1452, 14035), (1540, 13233), (1604, 12705), (1694, 12030), (1815, 11228), (2005, 10164), (2310, 8822), (2406, 8470), (2420, 8421), (2541, 8020), (2807, 7260), (3388, 6015), (3630, 5614), (4010, 5082), (4235, 4812), (4411, 4620)]