21808059

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{127}}^1$

素因数の和:204

約数の個数: 64

約数和(自身を含む): 39223296

約数和(自身を除く): 17415237

約数列:

[1, 3, 7, 13, 17, 21, 37, 39, 51, 91, 111, 119, 127, 221, 259, 273, 357, 381, 481, 629, 663, 777, 889, 1443, 1547, 1651, 1887, 2159, 2667, 3367, 4403, 4641, 4699, 4953, 6477, 8177, 10101, 11557, 13209, 14097, 15113, 24531, 28067, 32893, 34671, 45339, 57239, 61087, 79883, 84201, 98679, 171717, 183261, 196469, 239649, 427609, 559181, 589407, 1038479, 1282827, 1677543, 3115437, 7269353, 21808059]

約数ペア:

[(1, 21808059), (3, 7269353), (7, 3115437), (13, 1677543), (17, 1282827), (21, 1038479), (37, 589407), (39, 559181), (51, 427609), (91, 239649), (111, 196469), (119, 183261), (127, 171717), (221, 98679), (259, 84201), (273, 79883), (357, 61087), (381, 57239), (481, 45339), (629, 34671), (663, 32893), (777, 28067), (889, 24531), (1443, 15113), (1547, 14097), (1651, 13209), (1887, 11557), (2159, 10101), (2667, 8177), (3367, 6477), (4403, 4953), (4641, 4699)]