21049640

素因数分解:

$2^3\times 5^1\times {\mathrm{113}}^1\times {\mathrm{4657}}^1$

素因数の和:4781

約数の個数: 32

約数和(自身を含む): 47791080

約数和(自身を除く): 26741440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 113, 226, 452, 565, 904, 1130, 2260, 4520, 4657, 9314, 18628, 23285, 37256, 46570, 93140, 186280, 526241, 1052482, 2104964, 2631205, 4209928, 5262410, 10524820, 21049640]

約数ペア:

[(1, 21049640), (2, 10524820), (4, 5262410), (5, 4209928), (8, 2631205), (10, 2104964), (20, 1052482), (40, 526241), (113, 186280), (226, 93140), (452, 46570), (565, 37256), (904, 23285), (1130, 18628), (2260, 9314), (4520, 4657)]