20961759

素因数分解:

$3^1\times 7^3\times {\mathrm{13}}^1\times {\mathrm{1567}}^1$

素因数の和:1604

約数の個数: 32

約数和(自身を含む): 35123200

約数和(自身を除く): 14161441

約数列:

[1, 3, 7, 13, 21, 39, 49, 91, 147, 273, 343, 637, 1029, 1567, 1911, 4459, 4701, 10969, 13377, 20371, 32907, 61113, 76783, 142597, 230349, 427791, 537481, 998179, 1612443, 2994537, 6987253, 20961759]

約数ペア:

[(1, 20961759), (3, 6987253), (7, 2994537), (13, 1612443), (21, 998179), (39, 537481), (49, 427791), (91, 230349), (147, 142597), (273, 76783), (343, 61113), (637, 32907), (1029, 20371), (1567, 13377), (1911, 10969), (4459, 4701)]