21993818

素因数分解:

$2^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{271}}^1$

素因数の和:339

約数の個数: 64

約数和(自身を含む): 45121536

約数和(自身を除く): 23127718

約数列:

[1, 2, 7, 11, 14, 17, 22, 31, 34, 62, 77, 119, 154, 187, 217, 238, 271, 341, 374, 434, 527, 542, 682, 1054, 1309, 1897, 2387, 2618, 2981, 3689, 3794, 4607, 4774, 5797, 5962, 7378, 8401, 9214, 11594, 16802, 20867, 32249, 40579, 41734, 50677, 58807, 64498, 81158, 92411, 101354, 117614, 142817, 184822, 285634, 354739, 646877, 709478, 999719, 1293754, 1570987, 1999438, 3141974, 10996909, 21993818]

約数ペア:

[(1, 21993818), (2, 10996909), (7, 3141974), (11, 1999438), (14, 1570987), (17, 1293754), (22, 999719), (31, 709478), (34, 646877), (62, 354739), (77, 285634), (119, 184822), (154, 142817), (187, 117614), (217, 101354), (238, 92411), (271, 81158), (341, 64498), (374, 58807), (434, 50677), (527, 41734), (542, 40579), (682, 32249), (1054, 20867), (1309, 16802), (1897, 11594), (2387, 9214), (2618, 8401), (2981, 7378), (3689, 5962), (3794, 5797), (4607, 4774)]