20099000

素因数分解:

$2^3\times 5^3\times {\mathrm{101}}^1\times {\mathrm{199}}^1$

素因数の和:321

約数の個数: 64

約数和(自身を含む): 47736000

約数和(自身を除く): 27637000

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 101, 125, 199, 200, 202, 250, 398, 404, 500, 505, 796, 808, 995, 1000, 1010, 1592, 1990, 2020, 2525, 3980, 4040, 4975, 5050, 7960, 9950, 10100, 12625, 19900, 20099, 20200, 24875, 25250, 39800, 40198, 49750, 50500, 80396, 99500, 100495, 101000, 160792, 199000, 200990, 401980, 502475, 803960, 1004950, 2009900, 2512375, 4019800, 5024750, 10049500, 20099000]

約数ペア:

[(1, 20099000), (2, 10049500), (4, 5024750), (5, 4019800), (8, 2512375), (10, 2009900), (20, 1004950), (25, 803960), (40, 502475), (50, 401980), (100, 200990), (101, 199000), (125, 160792), (199, 101000), (200, 100495), (202, 99500), (250, 80396), (398, 50500), (404, 49750), (500, 40198), (505, 39800), (796, 25250), (808, 24875), (995, 20200), (1000, 20099), (1010, 19900), (1592, 12625), (1990, 10100), (2020, 9950), (2525, 7960), (3980, 5050), (4040, 4975)]