20512667721

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{259993}}^1$

素因数の和:260050

約数の個数: 48

約数和(自身を含む): 35758534784

約数和(自身を除く): 15245867063

約数列:

[1, 3, 7, 13, 17, 21, 39, 51, 91, 119, 221, 273, 289, 357, 663, 867, 1547, 2023, 3757, 4641, 6069, 11271, 26299, 78897, 259993, 779979, 1819951, 3379909, 4419881, 5459853, 10139727, 13259643, 23659363, 30939167, 57458453, 70978089, 75137977, 92817501, 172375359, 225413931, 402209171, 525965839, 976793701, 1206627513, 1577897517, 2930381103, 6837555907, 20512667721]

約数ペア:

[(1, 20512667721), (3, 6837555907), (7, 2930381103), (13, 1577897517), (17, 1206627513), (21, 976793701), (39, 525965839), (51, 402209171), (91, 225413931), (119, 172375359), (221, 92817501), (273, 75137977), (289, 70978089), (357, 57458453), (663, 30939167), (867, 23659363), (1547, 13259643), (2023, 10139727), (3757, 5459853), (4641, 4419881), (6069, 3379909), (11271, 1819951), (26299, 779979), (78897, 259993)]