2009900

素因数分解:

$2^2\times 5^2\times {\mathrm{101}}^1\times {\mathrm{199}}^1$

素因数の和:314

約数の個数: 36

約数和(自身を含む): 4426800

約数和(自身を除く): 2416900

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 101, 199, 202, 398, 404, 505, 796, 995, 1010, 1990, 2020, 2525, 3980, 4975, 5050, 9950, 10100, 19900, 20099, 40198, 80396, 100495, 200990, 401980, 502475, 1004950, 2009900]

約数ペア:

[(1, 2009900), (2, 1004950), (4, 502475), (5, 401980), (10, 200990), (20, 100495), (25, 80396), (50, 40198), (100, 20099), (101, 19900), (199, 10100), (202, 9950), (398, 5050), (404, 4975), (505, 3980), (796, 2525), (995, 2020), (1010, 1990)]