1389020

素因数分解:

$2^2\times 5^1\times {\mathrm{199}}^1\times {\mathrm{349}}^1$

素因数の和:557

約数の個数: 24

約数和(自身を含む): 2940000

約数和(自身を除く): 1550980

約数列:

[1, 2, 4, 5, 10, 20, 199, 349, 398, 698, 796, 995, 1396, 1745, 1990, 3490, 3980, 6980, 69451, 138902, 277804, 347255, 694510, 1389020]

約数ペア:

[(1, 1389020), (2, 694510), (4, 347255), (5, 277804), (10, 138902), (20, 69451), (199, 6980), (349, 3980), (398, 3490), (698, 1990), (796, 1745), (995, 1396)]