20640854

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{25609}}^1$

素因数の和:25655

約数の個数: 16

約数和(自身を含む): 34419840

約数和(自身を除く): 13778986

約数列:

[1, 2, 13, 26, 31, 62, 403, 806, 25609, 51218, 332917, 665834, 793879, 1587758, 10320427, 20640854]

約数ペア:

[(1, 20640854), (2, 10320427), (13, 1587758), (26, 793879), (31, 665834), (62, 332917), (403, 51218), (806, 25609)]