21373752

素因数分解:

$2^3\times 3^1\times {\mathrm{43}}^1\times {\mathrm{139}}^1\times {\mathrm{149}}^1$

素因数の和:340

約数の個数: 64

約数和(自身を含む): 55440000

約数和(自身を除く): 34066248

約数列:

[1, 2, 3, 4, 6, 8, 12, 24, 43, 86, 129, 139, 149, 172, 258, 278, 298, 344, 417, 447, 516, 556, 596, 834, 894, 1032, 1112, 1192, 1668, 1788, 3336, 3576, 5977, 6407, 11954, 12814, 17931, 19221, 20711, 23908, 25628, 35862, 38442, 41422, 47816, 51256, 62133, 71724, 76884, 82844, 124266, 143448, 153768, 165688, 248532, 497064, 890573, 1781146, 2671719, 3562292, 5343438, 7124584, 10686876, 21373752]

約数ペア:

[(1, 21373752), (2, 10686876), (3, 7124584), (4, 5343438), (6, 3562292), (8, 2671719), (12, 1781146), (24, 890573), (43, 497064), (86, 248532), (129, 165688), (139, 153768), (149, 143448), (172, 124266), (258, 82844), (278, 76884), (298, 71724), (344, 62133), (417, 51256), (447, 47816), (516, 41422), (556, 38442), (596, 35862), (834, 25628), (894, 23908), (1032, 20711), (1112, 19221), (1192, 17931), (1668, 12814), (1788, 11954), (3336, 6407), (3576, 5977)]