20640828

素因数分解:

$2^2\times 3^1\times {\mathrm{13}}^1\times {\mathrm{132313}}^1$

素因数の和:132333

約数の個数: 24

約数和(自身を含む): 51867088

約数和(自身を除く): 31226260

約数列:

[1, 2, 3, 4, 6, 12, 13, 26, 39, 52, 78, 156, 132313, 264626, 396939, 529252, 793878, 1587756, 1720069, 3440138, 5160207, 6880276, 10320414, 20640828]

約数ペア:

[(1, 20640828), (2, 10320414), (3, 6880276), (4, 5160207), (6, 3440138), (12, 1720069), (13, 1587756), (26, 793878), (39, 529252), (52, 396939), (78, 264626), (156, 132313)]