21170291920

素因数分解:

$2^4\times 5^1\times {\mathrm{7351}}^1\times {\mathrm{35999}}^1$

素因数の和:43363

約数の個数: 40

約数和(自身を含む): 49228992000

約数和(自身を除く): 28058700080

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 7351, 14702, 29404, 35999, 36755, 58808, 71998, 73510, 117616, 143996, 147020, 179995, 287992, 294040, 359990, 575984, 588080, 719980, 1439960, 2879920, 264628649, 529257298, 1058514596, 1323143245, 2117029192, 2646286490, 4234058384, 5292572980, 10585145960, 21170291920]

約数ペア:

[(1, 21170291920), (2, 10585145960), (4, 5292572980), (5, 4234058384), (8, 2646286490), (10, 2117029192), (16, 1323143245), (20, 1058514596), (40, 529257298), (80, 264628649), (7351, 2879920), (14702, 1439960), (29404, 719980), (35999, 588080), (36755, 575984), (58808, 359990), (71998, 294040), (73510, 287992), (117616, 179995), (143996, 147020)]