20781033

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{163}}^1\times {\mathrm{467}}^1$

素因数の和:653

約数の個数: 32

約数和(自身を含む): 34384896

約数和(自身を除く): 13603863

約数列:

[1, 3, 7, 13, 21, 39, 91, 163, 273, 467, 489, 1141, 1401, 2119, 3269, 3423, 6071, 6357, 9807, 14833, 18213, 42497, 44499, 76121, 127491, 228363, 532847, 989573, 1598541, 2968719, 6927011, 20781033]

約数ペア:

[(1, 20781033), (3, 6927011), (7, 2968719), (13, 1598541), (21, 989573), (39, 532847), (91, 228363), (163, 127491), (273, 76121), (467, 44499), (489, 42497), (1141, 18213), (1401, 14833), (2119, 9807), (3269, 6357), (3423, 6071)]