20320612

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{390781}}^1$

素因数の和:390798

約数の個数: 12

約数和(自身を含む): 38296636

約数和(自身を除く): 17976024

約数列:

[1, 2, 4, 13, 26, 52, 390781, 781562, 1563124, 5080153, 10160306, 20320612]

約数ペア:

[(1, 20320612), (2, 10160306), (4, 5080153), (13, 1563124), (26, 781562), (52, 390781)]