20471990

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{2417}}^1$

素因数の和:2453

約数の個数: 48

約数和(自身を含む): 46309536

約数和(自身を除く): 25837546

約数列:

[1, 2, 5, 7, 10, 11, 14, 22, 35, 55, 70, 77, 110, 121, 154, 242, 385, 605, 770, 847, 1210, 1694, 2417, 4235, 4834, 8470, 12085, 16919, 24170, 26587, 33838, 53174, 84595, 132935, 169190, 186109, 265870, 292457, 372218, 584914, 930545, 1462285, 1861090, 2047199, 2924570, 4094398, 10235995, 20471990]

約数ペア:

[(1, 20471990), (2, 10235995), (5, 4094398), (7, 2924570), (10, 2047199), (11, 1861090), (14, 1462285), (22, 930545), (35, 584914), (55, 372218), (70, 292457), (77, 265870), (110, 186109), (121, 169190), (154, 132935), (242, 84595), (385, 53174), (605, 33838), (770, 26587), (847, 24170), (1210, 16919), (1694, 12085), (2417, 8470), (4235, 4834)]