21274456

素因数分解:

$2^3\times 7^1\times {\mathrm{47}}^1\times {\mathrm{59}}^1\times {\mathrm{137}}^1$

素因数の和:256

約数の個数: 64

約数和(自身を含む): 47692800

約数和(自身を除く): 26418344

約数列:

[1, 2, 4, 7, 8, 14, 28, 47, 56, 59, 94, 118, 137, 188, 236, 274, 329, 376, 413, 472, 548, 658, 826, 959, 1096, 1316, 1652, 1918, 2632, 2773, 3304, 3836, 5546, 6439, 7672, 8083, 11092, 12878, 16166, 19411, 22184, 25756, 32332, 38822, 45073, 51512, 56581, 64664, 77644, 90146, 113162, 155288, 180292, 226324, 360584, 379901, 452648, 759802, 1519604, 2659307, 3039208, 5318614, 10637228, 21274456]

約数ペア:

[(1, 21274456), (2, 10637228), (4, 5318614), (7, 3039208), (8, 2659307), (14, 1519604), (28, 759802), (47, 452648), (56, 379901), (59, 360584), (94, 226324), (118, 180292), (137, 155288), (188, 113162), (236, 90146), (274, 77644), (329, 64664), (376, 56581), (413, 51512), (472, 45073), (548, 38822), (658, 32332), (826, 25756), (959, 22184), (1096, 19411), (1316, 16166), (1652, 12878), (1918, 11092), (2632, 8083), (2773, 7672), (3304, 6439), (3836, 5546)]