388675640

素因数分解:

$2^3\times 5^1\times {\mathrm{173}}^1\times {\mathrm{56167}}^1$

素因数の和:56351

約数の個数: 32

約数和(自身を含む): 879590880

約数和(自身を除く): 490915240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 173, 346, 692, 865, 1384, 1730, 3460, 6920, 56167, 112334, 224668, 280835, 449336, 561670, 1123340, 2246680, 9716891, 19433782, 38867564, 48584455, 77735128, 97168910, 194337820, 388675640]

約数ペア:

[(1, 388675640), (2, 194337820), (4, 97168910), (5, 77735128), (8, 48584455), (10, 38867564), (20, 19433782), (40, 9716891), (173, 2246680), (346, 1123340), (692, 561670), (865, 449336), (1384, 280835), (1730, 224668), (3460, 112334), (6920, 56167)]