20813986

素因数分解:

$2^1\times {\mathrm{109}}^1\times {\mathrm{307}}^1\times {\mathrm{311}}^1$

素因数の和:729

約数の個数: 16

約数和(自身を含む): 31711680

約数和(自身を除く): 10897694

約数列:

[1, 2, 109, 218, 307, 311, 614, 622, 33463, 33899, 66926, 67798, 95477, 190954, 10406993, 20813986]

約数ペア:

[(1, 20813986), (2, 10406993), (109, 190954), (218, 95477), (307, 67798), (311, 66926), (614, 33899), (622, 33463)]