19993048640

素因数分解:

$2^6\times 5^1\times {\mathrm{491}}^1\times {\mathrm{127247}}^1$

素因数の和:127755

約数の個数: 56

約数和(自身を含む): 47705784192

約数和(自身を除く): 27712735552

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 491, 982, 1964, 2455, 3928, 4910, 7856, 9820, 15712, 19640, 31424, 39280, 78560, 127247, 157120, 254494, 508988, 636235, 1017976, 1272470, 2035952, 2544940, 4071904, 5089880, 8143808, 10179760, 20359520, 40719040, 62478277, 124956554, 249913108, 312391385, 499826216, 624782770, 999652432, 1249565540, 1999304864, 2499131080, 3998609728, 4998262160, 9996524320, 19993048640]

約数ペア:

[(1, 19993048640), (2, 9996524320), (4, 4998262160), (5, 3998609728), (8, 2499131080), (10, 1999304864), (16, 1249565540), (20, 999652432), (32, 624782770), (40, 499826216), (64, 312391385), (80, 249913108), (160, 124956554), (320, 62478277), (491, 40719040), (982, 20359520), (1964, 10179760), (2455, 8143808), (3928, 5089880), (4910, 4071904), (7856, 2544940), (9820, 2035952), (15712, 1272470), (19640, 1017976), (31424, 636235), (39280, 508988), (78560, 254494), (127247, 157120)]