20781617680

素因数分解:

$2^4\times 5^1\times {\mathrm{137}}^1\times {\mathrm{1896133}}^1$

素因数の和:1896283

約数の個数: 40

約数和(自身を含む): 48669967512

約数和(自身を除く): 27888349832

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 137, 274, 548, 685, 1096, 1370, 2192, 2740, 5480, 10960, 1896133, 3792266, 7584532, 9480665, 15169064, 18961330, 30338128, 37922660, 75845320, 151690640, 259770221, 519540442, 1039080884, 1298851105, 2078161768, 2597702210, 4156323536, 5195404420, 10390808840, 20781617680]

約数ペア:

[(1, 20781617680), (2, 10390808840), (4, 5195404420), (5, 4156323536), (8, 2597702210), (10, 2078161768), (16, 1298851105), (20, 1039080884), (40, 519540442), (80, 259770221), (137, 151690640), (274, 75845320), (548, 37922660), (685, 30338128), (1096, 18961330), (1370, 15169064), (2192, 9480665), (2740, 7584532), (5480, 3792266), (10960, 1896133)]