20991604

素因数分解:

$2^2\times {\mathrm{53}}^1\times {\mathrm{99017}}^1$

素因数の和:99074

約数の個数: 12

約数和(自身を含む): 37428804

約数和(自身を除く): 16437200

約数列:

[1, 2, 4, 53, 106, 212, 99017, 198034, 396068, 5247901, 10495802, 20991604]

約数ペア:

[(1, 20991604), (2, 10495802), (4, 5247901), (53, 396068), (106, 198034), (212, 99017)]