20391860

素因数分解:

$2^2\times 5^1\times {\mathrm{563}}^1\times {\mathrm{1811}}^1$

素因数の和:2383

約数の個数: 24

約数和(自身を含む): 42922656

約数和(自身を除く): 22530796

約数列:

[1, 2, 4, 5, 10, 20, 563, 1126, 1811, 2252, 2815, 3622, 5630, 7244, 9055, 11260, 18110, 36220, 1019593, 2039186, 4078372, 5097965, 10195930, 20391860]

約数ペア:

[(1, 20391860), (2, 10195930), (4, 5097965), (5, 4078372), (10, 2039186), (20, 1019593), (563, 36220), (1126, 18110), (1811, 11260), (2252, 9055), (2815, 7244), (3622, 5630)]