31181787

素因数分解:

$3^3\times 7^4\times {\mathrm{13}}^1\times {\mathrm{37}}^1$

素因数の和:87

約数の個数: 80

約数和(自身を含む): 59605280

約数和(自身を除く): 28423493

約数列:

[1, 3, 7, 9, 13, 21, 27, 37, 39, 49, 63, 91, 111, 117, 147, 189, 259, 273, 333, 343, 351, 441, 481, 637, 777, 819, 999, 1029, 1323, 1443, 1813, 1911, 2331, 2401, 2457, 3087, 3367, 4329, 4459, 5439, 5733, 6993, 7203, 9261, 10101, 12691, 12987, 13377, 16317, 17199, 21609, 23569, 30303, 31213, 38073, 40131, 48951, 64827, 70707, 88837, 90909, 93639, 114219, 120393, 164983, 212121, 266511, 280917, 342657, 494949, 636363, 799533, 842751, 1154881, 1484847, 2398599, 3464643, 4454541, 10393929, 31181787]

約数ペア:

[(1, 31181787), (3, 10393929), (7, 4454541), (9, 3464643), (13, 2398599), (21, 1484847), (27, 1154881), (37, 842751), (39, 799533), (49, 636363), (63, 494949), (91, 342657), (111, 280917), (117, 266511), (147, 212121), (189, 164983), (259, 120393), (273, 114219), (333, 93639), (343, 90909), (351, 88837), (441, 70707), (481, 64827), (637, 48951), (777, 40131), (819, 38073), (999, 31213), (1029, 30303), (1323, 23569), (1443, 21609), (1813, 17199), (1911, 16317), (2331, 13377), (2401, 12987), (2457, 12691), (3087, 10101), (3367, 9261), (4329, 7203), (4459, 6993), (5439, 5733)]