20781617640

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{348451}}^1$

素因数の和:348543

約数の個数: 128

約数和(自身を含む): 72255006720

約数和(自身を除く): 51473389080

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 71, 84, 105, 120, 140, 142, 168, 210, 213, 280, 284, 355, 420, 426, 497, 568, 710, 840, 852, 994, 1065, 1420, 1491, 1704, 1988, 2130, 2485, 2840, 2982, 3976, 4260, 4970, 5964, 7455, 8520, 9940, 11928, 14910, 19880, 29820, 59640, 348451, 696902, 1045353, 1393804, 1742255, 2090706, 2439157, 2787608, 3484510, 4181412, 4878314, 5226765, 6969020, 7317471, 8362824, 9756628, 10453530, 12195785, 13938040, 14634942, 19513256, 20907060, 24391570, 24740021, 29269884, 36587355, 41814120, 48783140, 49480042, 58539768, 73174710, 74220063, 97566280, 98960084, 123700105, 146349420, 148440126, 173180147, 197920168, 247400210, 292698840, 296880252, 346360294, 371100315, 494800420, 519540441, 593760504, 692720588, 742200630, 865900735, 989600840, 1039080882, 1385441176, 1484401260, 1731801470, 2078161764, 2597702205, 2968802520, 3463602940, 4156323528, 5195404410, 6927205880, 10390808820, 20781617640]

約数ペア:

[(1, 20781617640), (2, 10390808820), (3, 6927205880), (4, 5195404410), (5, 4156323528), (6, 3463602940), (7, 2968802520), (8, 2597702205), (10, 2078161764), (12, 1731801470), (14, 1484401260), (15, 1385441176), (20, 1039080882), (21, 989600840), (24, 865900735), (28, 742200630), (30, 692720588), (35, 593760504), (40, 519540441), (42, 494800420), (56, 371100315), (60, 346360294), (70, 296880252), (71, 292698840), (84, 247400210), (105, 197920168), (120, 173180147), (140, 148440126), (142, 146349420), (168, 123700105), (210, 98960084), (213, 97566280), (280, 74220063), (284, 73174710), (355, 58539768), (420, 49480042), (426, 48783140), (497, 41814120), (568, 36587355), (710, 29269884), (840, 24740021), (852, 24391570), (994, 20907060), (1065, 19513256), (1420, 14634942), (1491, 13938040), (1704, 12195785), (1988, 10453530), (2130, 9756628), (2485, 8362824), (2840, 7317471), (2982, 6969020), (3976, 5226765), (4260, 4878314), (4970, 4181412), (5964, 3484510), (7455, 2787608), (8520, 2439157), (9940, 2090706), (11928, 1742255), (14910, 1393804), (19880, 1045353), (29820, 696902), (59640, 348451)]