20199451640

素因数分解:

$2^3\times 5^1\times {\mathrm{1279}}^1\times {\mathrm{394829}}^1$

素因数の和:396119

約数の個数: 32

約数和(自身を含む): 45484416000

約数和(自身を除く): 25284964360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1279, 2558, 5116, 6395, 10232, 12790, 25580, 51160, 394829, 789658, 1579316, 1974145, 3158632, 3948290, 7896580, 15793160, 504986291, 1009972582, 2019945164, 2524931455, 4039890328, 5049862910, 10099725820, 20199451640]

約数ペア:

[(1, 20199451640), (2, 10099725820), (4, 5049862910), (5, 4039890328), (8, 2524931455), (10, 2019945164), (20, 1009972582), (40, 504986291), (1279, 15793160), (2558, 7896580), (5116, 3948290), (6395, 3158632), (10232, 1974145), (12790, 1579316), (25580, 789658), (51160, 394829)]