20979777

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{67}}^1$

素因数の和:158

約数の個数: 64

約数和(自身を含む): 37044224

約数和(自身を除く): 16064447

約数列:

[1, 3, 7, 13, 21, 31, 37, 39, 67, 91, 93, 111, 201, 217, 259, 273, 403, 469, 481, 651, 777, 871, 1147, 1209, 1407, 1443, 2077, 2479, 2613, 2821, 3367, 3441, 6097, 6231, 7437, 8029, 8463, 10101, 14539, 14911, 17353, 18291, 24087, 27001, 32227, 43617, 44733, 52059, 76849, 81003, 96681, 104377, 189007, 225589, 230547, 313131, 537943, 567021, 676767, 999037, 1613829, 2997111, 6993259, 20979777]

約数ペア:

[(1, 20979777), (3, 6993259), (7, 2997111), (13, 1613829), (21, 999037), (31, 676767), (37, 567021), (39, 537943), (67, 313131), (91, 230547), (93, 225589), (111, 189007), (201, 104377), (217, 96681), (259, 81003), (273, 76849), (403, 52059), (469, 44733), (481, 43617), (651, 32227), (777, 27001), (871, 24087), (1147, 18291), (1209, 17353), (1407, 14911), (1443, 14539), (2077, 10101), (2479, 8463), (2613, 8029), (2821, 7437), (3367, 6231), (3441, 6097)]