20780051877

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{28753}}^1$

素因数の和:28875

約数の個数: 64

約数和(自身を含む): 34780838400

約数和(自身を除く): 14000786523

約数列:

[1, 3, 9, 13, 27, 29, 39, 71, 87, 117, 213, 261, 351, 377, 639, 783, 923, 1131, 1917, 2059, 2769, 3393, 6177, 8307, 10179, 18531, 24921, 26767, 28753, 55593, 80301, 86259, 240903, 258777, 373789, 722709, 776331, 833837, 1121367, 2041463, 2501511, 3364101, 6124389, 7504533, 10092303, 10839881, 18373167, 22513599, 26539019, 32519643, 55119501, 59202427, 79617057, 97558929, 177607281, 238851171, 292676787, 532821843, 716553513, 769631551, 1598465529, 2308894653, 6926683959, 20780051877]

約数ペア:

[(1, 20780051877), (3, 6926683959), (9, 2308894653), (13, 1598465529), (27, 769631551), (29, 716553513), (39, 532821843), (71, 292676787), (87, 238851171), (117, 177607281), (213, 97558929), (261, 79617057), (351, 59202427), (377, 55119501), (639, 32519643), (783, 26539019), (923, 22513599), (1131, 18373167), (1917, 10839881), (2059, 10092303), (2769, 7504533), (3393, 6124389), (6177, 3364101), (8307, 2501511), (10179, 2041463), (18531, 1121367), (24921, 833837), (26767, 776331), (28753, 722709), (55593, 373789), (80301, 258777), (86259, 240903)]