20987343

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{1049}}^1$

素因数の和:1093

約数の個数: 40

約数和(自身を含む): 35574000

約数和(自身を除く): 14586657

約数列:

[1, 3, 9, 13, 19, 27, 39, 57, 81, 117, 171, 247, 351, 513, 741, 1049, 1053, 1539, 2223, 3147, 6669, 9441, 13637, 19931, 20007, 28323, 40911, 59793, 84969, 122733, 179379, 259103, 368199, 538137, 777309, 1104597, 1614411, 2331927, 6995781, 20987343]

約数ペア:

[(1, 20987343), (3, 6995781), (9, 2331927), (13, 1614411), (19, 1104597), (27, 777309), (39, 538137), (57, 368199), (81, 259103), (117, 179379), (171, 122733), (247, 84969), (351, 59793), (513, 40911), (741, 28323), (1049, 20007), (1053, 19931), (1539, 13637), (2223, 9441), (3147, 6669)]