20780606

素因数分解:

$2^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{521}}^1$

素因数の和:585

約数の個数: 48

約数和(自身を含む): 40703472

約数和(自身を除く): 19922866

約数列:

[1, 2, 7, 11, 14, 22, 37, 49, 74, 77, 98, 154, 259, 407, 518, 521, 539, 814, 1042, 1078, 1813, 2849, 3626, 3647, 5698, 5731, 7294, 11462, 19277, 19943, 25529, 38554, 39886, 40117, 51058, 80234, 134939, 212047, 269878, 280819, 424094, 561638, 944573, 1484329, 1889146, 2968658, 10390303, 20780606]

約数ペア:

[(1, 20780606), (2, 10390303), (7, 2968658), (11, 1889146), (14, 1484329), (22, 944573), (37, 561638), (49, 424094), (74, 280819), (77, 269878), (98, 212047), (154, 134939), (259, 80234), (407, 51058), (518, 40117), (521, 39886), (539, 38554), (814, 25529), (1042, 19943), (1078, 19277), (1813, 11462), (2849, 7294), (3626, 5731), (3647, 5698)]