20640776

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{198469}}^1$

素因数の和:198488

約数の個数: 16

約数和(自身を含む): 41678700

約数和(自身を除く): 21037924

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 198469, 396938, 793876, 1587752, 2580097, 5160194, 10320388, 20640776]

約数ペア:

[(1, 20640776), (2, 10320388), (4, 5160194), (8, 2580097), (13, 1587752), (26, 793876), (52, 396938), (104, 198469)]