210920157

素因数分解:

$3^2\times 7^2\times {\mathrm{257}}^1\times {\mathrm{1861}}^1$

素因数の和:2138

約数の個数: 36

約数和(自身を含む): 355973436

約数和(自身を除く): 145053279

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 257, 441, 771, 1799, 1861, 2313, 5397, 5583, 12593, 13027, 16191, 16749, 37779, 39081, 91189, 113337, 117243, 273567, 478277, 820701, 1434831, 3347939, 4304493, 10043817, 23435573, 30131451, 70306719, 210920157]

約数ペア:

[(1, 210920157), (3, 70306719), (7, 30131451), (9, 23435573), (21, 10043817), (49, 4304493), (63, 3347939), (147, 1434831), (257, 820701), (441, 478277), (771, 273567), (1799, 117243), (1861, 113337), (2313, 91189), (5397, 39081), (5583, 37779), (12593, 16749), (13027, 16191)]