20491713

素因数分解:

$3^2\times {\mathrm{11}}^2\times {\mathrm{31}}^1\times {\mathrm{607}}^1$

素因数の和:666

約数の個数: 36

約数和(自身を含む): 33639424

約数和(自身を除く): 13147711

約数列:

[1, 3, 9, 11, 31, 33, 93, 99, 121, 279, 341, 363, 607, 1023, 1089, 1821, 3069, 3751, 5463, 6677, 11253, 18817, 20031, 33759, 56451, 60093, 73447, 169353, 206987, 220341, 620961, 661023, 1862883, 2276857, 6830571, 20491713]

約数ペア:

[(1, 20491713), (3, 6830571), (9, 2276857), (11, 1862883), (31, 661023), (33, 620961), (93, 220341), (99, 206987), (121, 169353), (279, 73447), (341, 60093), (363, 56451), (607, 33759), (1023, 20031), (1089, 18817), (1821, 11253), (3069, 6677), (3751, 5463)]