20806916739

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{1997}}^1\times {\mathrm{26113}}^1$

素因数の和:28139

約数の個数: 32

約数和(自身を含む): 33392494080

約数和(自身を除く): 12585577341

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 1997, 5991, 13979, 26113, 37943, 41937, 78339, 113829, 182791, 265601, 496147, 548373, 796803, 1488441, 3473029, 10419087, 52147661, 156442983, 365033627, 990805559, 1095100881, 2972416677, 6935638913, 20806916739]

約数ペア:

[(1, 20806916739), (3, 6935638913), (7, 2972416677), (19, 1095100881), (21, 990805559), (57, 365033627), (133, 156442983), (399, 52147661), (1997, 10419087), (5991, 3473029), (13979, 1488441), (26113, 796803), (37943, 548373), (41937, 496147), (78339, 265601), (113829, 182791)]