20883940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{191}}^1$

素因数の和:289

約数の個数: 96

約数和(自身を含む): 55738368

約数和(自身を除く): 34854428

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 71, 77, 110, 140, 142, 154, 191, 220, 284, 308, 355, 382, 385, 497, 710, 764, 770, 781, 955, 994, 1337, 1420, 1540, 1562, 1910, 1988, 2101, 2485, 2674, 3124, 3820, 3905, 4202, 4970, 5348, 5467, 6685, 7810, 8404, 9940, 10505, 10934, 13370, 13561, 14707, 15620, 21010, 21868, 26740, 27122, 27335, 29414, 42020, 54244, 54670, 58828, 67805, 73535, 94927, 109340, 135610, 147070, 149171, 189854, 271220, 294140, 298342, 379708, 474635, 596684, 745855, 949270, 1044197, 1491710, 1898540, 2088394, 2983420, 4176788, 5220985, 10441970, 20883940]

約数ペア:

[(1, 20883940), (2, 10441970), (4, 5220985), (5, 4176788), (7, 2983420), (10, 2088394), (11, 1898540), (14, 1491710), (20, 1044197), (22, 949270), (28, 745855), (35, 596684), (44, 474635), (55, 379708), (70, 298342), (71, 294140), (77, 271220), (110, 189854), (140, 149171), (142, 147070), (154, 135610), (191, 109340), (220, 94927), (284, 73535), (308, 67805), (355, 58828), (382, 54670), (385, 54244), (497, 42020), (710, 29414), (764, 27335), (770, 27122), (781, 26740), (955, 21868), (994, 21010), (1337, 15620), (1420, 14707), (1540, 13561), (1562, 13370), (1910, 10934), (1988, 10505), (2101, 9940), (2485, 8404), (2674, 7810), (3124, 6685), (3820, 5467), (3905, 5348), (4202, 4970)]