20489573

素因数分解:

${\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{139}}^1$

素因数の和:221

約数の個数: 32

約数和(自身を含む): 25401600

約数和(自身を除く): 4912027

約数列:

[1, 13, 17, 23, 29, 139, 221, 299, 377, 391, 493, 667, 1807, 2363, 3197, 4031, 5083, 6409, 8671, 11339, 30719, 41561, 52403, 54349, 68527, 92713, 147407, 706537, 890851, 1205269, 1576121, 20489573]

約数ペア:

[(1, 20489573), (13, 1576121), (17, 1205269), (23, 890851), (29, 706537), (139, 147407), (221, 92713), (299, 68527), (377, 54349), (391, 52403), (493, 41561), (667, 30719), (1807, 11339), (2363, 8671), (3197, 6409), (4031, 5083)]