217655647

素因数分解:

${\mathrm{11}}^2\times {\mathrm{23}}^1\times {\mathrm{197}}^1\times {\mathrm{397}}^1$

素因数の和:639

約数の個数: 24

約数和(自身を含む): 251542368

約数和(自身を除く): 33886721

約数列:

[1, 11, 23, 121, 197, 253, 397, 2167, 2783, 4367, 4531, 9131, 23837, 48037, 49841, 78209, 100441, 548251, 860299, 1104851, 1798807, 9463289, 19786877, 217655647]

約数ペア:

[(1, 217655647), (11, 19786877), (23, 9463289), (121, 1798807), (197, 1104851), (253, 860299), (397, 548251), (2167, 100441), (2783, 78209), (4367, 49841), (4531, 48037), (9131, 23837)]