21082740

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{71}}^1\times {\mathrm{101}}^1$

素因数の和:198

約数の個数: 144

約数和(自身を含む): 70326144

約数和(自身を除く): 49243404

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 49, 60, 70, 71, 84, 98, 101, 105, 140, 142, 147, 196, 202, 210, 213, 245, 284, 294, 303, 355, 404, 420, 426, 490, 497, 505, 588, 606, 707, 710, 735, 852, 980, 994, 1010, 1065, 1212, 1414, 1420, 1470, 1491, 1515, 1988, 2020, 2121, 2130, 2485, 2828, 2940, 2982, 3030, 3479, 3535, 4242, 4260, 4949, 4970, 5964, 6060, 6958, 7070, 7171, 7455, 8484, 9898, 9940, 10437, 10605, 13916, 14140, 14342, 14847, 14910, 17395, 19796, 20874, 21210, 21513, 24745, 28684, 29694, 29820, 34790, 35855, 41748, 42420, 43026, 49490, 50197, 52185, 59388, 69580, 71710, 74235, 86052, 98980, 100394, 104370, 107565, 143420, 148470, 150591, 200788, 208740, 215130, 250985, 296940, 301182, 351379, 430260, 501970, 602364, 702758, 752955, 1003940, 1054137, 1405516, 1505910, 1756895, 2108274, 3011820, 3513790, 4216548, 5270685, 7027580, 10541370, 21082740]

約数ペア:

[(1, 21082740), (2, 10541370), (3, 7027580), (4, 5270685), (5, 4216548), (6, 3513790), (7, 3011820), (10, 2108274), (12, 1756895), (14, 1505910), (15, 1405516), (20, 1054137), (21, 1003940), (28, 752955), (30, 702758), (35, 602364), (42, 501970), (49, 430260), (60, 351379), (70, 301182), (71, 296940), (84, 250985), (98, 215130), (101, 208740), (105, 200788), (140, 150591), (142, 148470), (147, 143420), (196, 107565), (202, 104370), (210, 100394), (213, 98980), (245, 86052), (284, 74235), (294, 71710), (303, 69580), (355, 59388), (404, 52185), (420, 50197), (426, 49490), (490, 43026), (497, 42420), (505, 41748), (588, 35855), (606, 34790), (707, 29820), (710, 29694), (735, 28684), (852, 24745), (980, 21513), (994, 21210), (1010, 20874), (1065, 19796), (1212, 17395), (1414, 14910), (1420, 14847), (1470, 14342), (1491, 14140), (1515, 13916), (1988, 10605), (2020, 10437), (2121, 9940), (2130, 9898), (2485, 8484), (2828, 7455), (2940, 7171), (2982, 7070), (3030, 6958), (3479, 6060), (3535, 5964), (4242, 4970), (4260, 4949)]