18731188

素因数分解:

$2^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{137}}^1\times {\mathrm{257}}^1$

素因数の和:424

約数の個数: 48

約数和(自身を含む): 39876480

約数和(自身を除く): 21145292

約数列:

[1, 2, 4, 7, 14, 19, 28, 38, 76, 133, 137, 257, 266, 274, 514, 532, 548, 959, 1028, 1799, 1918, 2603, 3598, 3836, 4883, 5206, 7196, 9766, 10412, 18221, 19532, 34181, 35209, 36442, 68362, 70418, 72884, 136724, 140836, 246463, 492926, 668971, 985852, 1337942, 2675884, 4682797, 9365594, 18731188]

約数ペア:

[(1, 18731188), (2, 9365594), (4, 4682797), (7, 2675884), (14, 1337942), (19, 985852), (28, 668971), (38, 492926), (76, 246463), (133, 140836), (137, 136724), (257, 72884), (266, 70418), (274, 68362), (514, 36442), (532, 35209), (548, 34181), (959, 19532), (1028, 18221), (1799, 10412), (1918, 9766), (2603, 7196), (3598, 5206), (3836, 4883)]