21420804987

素因数分解:

$3^2\times {\mathrm{547}}^1\times {\mathrm{1559}}^1\times {\mathrm{2791}}^1$

素因数の和:4903

約数の個数: 24

約数和(自身を含む): 31028724480

約数和(自身を除く): 9607919493

約数列:

[1, 3, 9, 547, 1559, 1641, 2791, 4677, 4923, 8373, 14031, 25119, 852773, 1526677, 2558319, 4351169, 4580031, 7674957, 13053507, 13740093, 39160521, 2380089443, 7140268329, 21420804987]

約数ペア:

[(1, 21420804987), (3, 7140268329), (9, 2380089443), (547, 39160521), (1559, 13740093), (1641, 13053507), (2791, 7674957), (4677, 4580031), (4923, 4351169), (8373, 2558319), (14031, 1526677), (25119, 852773)]