21108305

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{103}}^1\times {\mathrm{2411}}^1$

素因数の和:2536

約数の個数: 16

約数和(自身を含む): 27091584

約数和(自身を除く): 5983279

約数列:

[1, 5, 17, 85, 103, 515, 1751, 2411, 8755, 12055, 40987, 204935, 248333, 1241665, 4221661, 21108305]

約数ペア:

[(1, 21108305), (5, 4221661), (17, 1241665), (85, 248333), (103, 204935), (515, 40987), (1751, 12055), (2411, 8755)]