20281378

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{25163}}^1$

素因数の和:25209

約数の個数: 16

約数和(自身を含む): 33820416

約数和(自身を除く): 13539038

約数列:

[1, 2, 13, 26, 31, 62, 403, 806, 25163, 50326, 327119, 654238, 780053, 1560106, 10140689, 20281378]

約数ペア:

[(1, 20281378), (2, 10140689), (13, 1560106), (26, 780053), (31, 654238), (62, 327119), (403, 50326), (806, 25163)]