21259628

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{389}}^1\times {\mathrm{1051}}^1$

素因数の和:1457

約数の個数: 24

約数和(自身を含む): 40207440

約数和(自身を除く): 18947812

約数列:

[1, 2, 4, 13, 26, 52, 389, 778, 1051, 1556, 2102, 4204, 5057, 10114, 13663, 20228, 27326, 54652, 408839, 817678, 1635356, 5314907, 10629814, 21259628]

約数ペア:

[(1, 21259628), (2, 10629814), (4, 5314907), (13, 1635356), (26, 817678), (52, 408839), (389, 54652), (778, 27326), (1051, 20228), (1556, 13663), (2102, 10114), (4204, 5057)]