20911761

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{409}}^1$

素因数の和:470

約数の個数: 48

約数和(自身を含む): 35817600

約数和(自身を除く): 14905839

約数列:

[1, 3, 9, 13, 19, 23, 39, 57, 69, 117, 171, 207, 247, 299, 409, 437, 741, 897, 1227, 1311, 2223, 2691, 3681, 3933, 5317, 5681, 7771, 9407, 15951, 17043, 23313, 28221, 47853, 51129, 69939, 84663, 101023, 122291, 178733, 303069, 366873, 536199, 909207, 1100619, 1608597, 2323529, 6970587, 20911761]

約数ペア:

[(1, 20911761), (3, 6970587), (9, 2323529), (13, 1608597), (19, 1100619), (23, 909207), (39, 536199), (57, 366873), (69, 303069), (117, 178733), (171, 122291), (207, 101023), (247, 84663), (299, 69939), (409, 51129), (437, 47853), (741, 28221), (897, 23313), (1227, 17043), (1311, 15951), (2223, 9407), (2691, 7771), (3681, 5681), (3933, 5317)]