2778040

素因数分解:

$2^3\times 5^1\times {\mathrm{199}}^1\times {\mathrm{349}}^1$

素因数の和:559

約数の個数: 32

約数和(自身を含む): 6300000

約数和(自身を除く): 3521960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 199, 349, 398, 698, 796, 995, 1396, 1592, 1745, 1990, 2792, 3490, 3980, 6980, 7960, 13960, 69451, 138902, 277804, 347255, 555608, 694510, 1389020, 2778040]

約数ペア:

[(1, 2778040), (2, 1389020), (4, 694510), (5, 555608), (8, 347255), (10, 277804), (20, 138902), (40, 69451), (199, 13960), (349, 7960), (398, 6980), (698, 3980), (796, 3490), (995, 2792), (1396, 1990), (1592, 1745)]