20996848460

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{1129}}^1\times {\mathrm{1871}}^1$

素因数の和:3087

約数の個数: 96

約数和(自身を含む): 51174789120

約数和(自身を除く): 30177940660

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 71, 140, 142, 284, 355, 497, 710, 994, 1129, 1420, 1871, 1988, 2258, 2485, 3742, 4516, 4970, 5645, 7484, 7903, 9355, 9940, 11290, 13097, 15806, 18710, 22580, 26194, 31612, 37420, 39515, 52388, 65485, 79030, 80159, 130970, 132841, 158060, 160318, 261940, 265682, 320636, 400795, 531364, 561113, 664205, 801590, 929887, 1122226, 1328410, 1603180, 1859774, 2112359, 2244452, 2656820, 2805565, 3719548, 4224718, 4649435, 5611130, 8449436, 9298870, 10561795, 11222260, 14786513, 18597740, 21123590, 29573026, 42247180, 59146052, 73932565, 147865130, 149977489, 295730260, 299954978, 599909956, 749887445, 1049842423, 1499774890, 2099684846, 2999549780, 4199369692, 5249212115, 10498424230, 20996848460]

約数ペア:

[(1, 20996848460), (2, 10498424230), (4, 5249212115), (5, 4199369692), (7, 2999549780), (10, 2099684846), (14, 1499774890), (20, 1049842423), (28, 749887445), (35, 599909956), (70, 299954978), (71, 295730260), (140, 149977489), (142, 147865130), (284, 73932565), (355, 59146052), (497, 42247180), (710, 29573026), (994, 21123590), (1129, 18597740), (1420, 14786513), (1871, 11222260), (1988, 10561795), (2258, 9298870), (2485, 8449436), (3742, 5611130), (4516, 4649435), (4970, 4224718), (5645, 3719548), (7484, 2805565), (7903, 2656820), (9355, 2244452), (9940, 2112359), (11290, 1859774), (13097, 1603180), (15806, 1328410), (18710, 1122226), (22580, 929887), (26194, 801590), (31612, 664205), (37420, 561113), (39515, 531364), (52388, 400795), (65485, 320636), (79030, 265682), (80159, 261940), (130970, 160318), (132841, 158060)]