21089879128

素因数分解:

$2^3\times {\mathrm{197}}^1\times {\mathrm{13381903}}^1$

素因数の和:13382106

約数の個数: 16

約数和(自身を含む): 39744254880

約数和(自身を除く): 18654375752

約数列:

[1, 2, 4, 8, 197, 394, 788, 1576, 13381903, 26763806, 53527612, 107055224, 2636234891, 5272469782, 10544939564, 21089879128]

約数ペア:

[(1, 21089879128), (2, 10544939564), (4, 5272469782), (8, 2636234891), (197, 107055224), (394, 53527612), (788, 26763806), (1576, 13381903)]