21305739

素因数分解:

$3^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{11149}}^1$

素因数の和:11179

約数の個数: 24

約数和(自身を含む): 35590800

約数和(自身を除く): 14285061

約数列:

[1, 3, 7, 13, 21, 39, 49, 91, 147, 273, 637, 1911, 11149, 33447, 78043, 144937, 234129, 434811, 546301, 1014559, 1638903, 3043677, 7101913, 21305739]

約数ペア:

[(1, 21305739), (3, 7101913), (7, 3043677), (13, 1638903), (21, 1014559), (39, 546301), (49, 434811), (91, 234129), (147, 144937), (273, 78043), (637, 33447), (1911, 11149)]