18879721

素因数分解:

$7^1\times {\mathrm{41}}^1\times {\mathrm{157}}^1\times {\mathrm{419}}^1$

素因数の和:624

約数の個数: 16

約数和(自身を含む): 22296960

約数和(自身を除く): 3417239

約数列:

[1, 7, 41, 157, 287, 419, 1099, 2933, 6437, 17179, 45059, 65783, 120253, 460481, 2697103, 18879721]

約数ペア:

[(1, 18879721), (7, 2697103), (41, 460481), (157, 120253), (287, 65783), (419, 45059), (1099, 17179), (2933, 6437)]