18986996

素因数分解:

$2^2\times 7^1\times {\mathrm{29}}^1\times {\mathrm{67}}^1\times {\mathrm{349}}^1$

素因数の和:456

約数の個数: 48

約数和(自身を含む): 39984000

約数和(自身を除く): 20997004

約数列:

[1, 2, 4, 7, 14, 28, 29, 58, 67, 116, 134, 203, 268, 349, 406, 469, 698, 812, 938, 1396, 1876, 1943, 2443, 3886, 4886, 7772, 9772, 10121, 13601, 20242, 23383, 27202, 40484, 46766, 54404, 70847, 93532, 141694, 163681, 283388, 327362, 654724, 678107, 1356214, 2712428, 4746749, 9493498, 18986996]

約数ペア:

[(1, 18986996), (2, 9493498), (4, 4746749), (7, 2712428), (14, 1356214), (28, 678107), (29, 654724), (58, 327362), (67, 283388), (116, 163681), (134, 141694), (203, 93532), (268, 70847), (349, 54404), (406, 46766), (469, 40484), (698, 27202), (812, 23383), (938, 20242), (1396, 13601), (1876, 10121), (1943, 9772), (2443, 7772), (3886, 4886)]