21985769

素因数分解:

${\mathrm{13}}^1\times {\mathrm{23}}^3\times {\mathrm{139}}^1$

素因数の和:221

約数の個数: 16

約数和(自身を含む): 24931200

約数和(自身を除く): 2945431

約数列:

[1, 13, 23, 139, 299, 529, 1807, 3197, 6877, 12167, 41561, 73531, 158171, 955903, 1691213, 21985769]

約数ペア:

[(1, 21985769), (13, 1691213), (23, 955903), (139, 158171), (299, 73531), (529, 41561), (1807, 12167), (3197, 6877)]