20641868

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{167}}^1\times {\mathrm{2377}}^1$

素因数の和:2561

約数の個数: 24

約数和(自身を含む): 39151392

約数和(自身を除く): 18509524

約数列:

[1, 2, 4, 13, 26, 52, 167, 334, 668, 2171, 2377, 4342, 4754, 8684, 9508, 30901, 61802, 123604, 396959, 793918, 1587836, 5160467, 10320934, 20641868]

約数ペア:

[(1, 20641868), (2, 10320934), (4, 5160467), (13, 1587836), (26, 793918), (52, 396959), (167, 123604), (334, 61802), (668, 30901), (2171, 9508), (2377, 8684), (4342, 4754)]