21667828

素因数分解:

$2^2\times 7^1\times {\mathrm{13}}^2\times {\mathrm{19}}^1\times {\mathrm{241}}^1$

素因数の和:297

約数の個数: 72

約数和(自身を含む): 49600320

約数和(自身を除く): 27932492

約数列:

[1, 2, 4, 7, 13, 14, 19, 26, 28, 38, 52, 76, 91, 133, 169, 182, 241, 247, 266, 338, 364, 482, 494, 532, 676, 964, 988, 1183, 1687, 1729, 2366, 3133, 3211, 3374, 3458, 4579, 4732, 6266, 6422, 6748, 6916, 9158, 12532, 12844, 18316, 21931, 22477, 32053, 40729, 43862, 44954, 59527, 64106, 81458, 87724, 89908, 119054, 128212, 162916, 238108, 285103, 416689, 570206, 773851, 833378, 1140412, 1547702, 1666756, 3095404, 5416957, 10833914, 21667828]

約数ペア:

[(1, 21667828), (2, 10833914), (4, 5416957), (7, 3095404), (13, 1666756), (14, 1547702), (19, 1140412), (26, 833378), (28, 773851), (38, 570206), (52, 416689), (76, 285103), (91, 238108), (133, 162916), (169, 128212), (182, 119054), (241, 89908), (247, 87724), (266, 81458), (338, 64106), (364, 59527), (482, 44954), (494, 43862), (532, 40729), (676, 32053), (964, 22477), (988, 21931), (1183, 18316), (1687, 12844), (1729, 12532), (2366, 9158), (3133, 6916), (3211, 6748), (3374, 6422), (3458, 6266), (4579, 4732)]