8720180

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{199}}^1\times {\mathrm{313}}^1$

素因数の和:528

約数の個数: 48

約数和(自身を含む): 21100800

約数和(自身を除く): 12380620

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 199, 313, 398, 626, 796, 995, 1252, 1393, 1565, 1990, 2191, 2786, 3130, 3980, 4382, 5572, 6260, 6965, 8764, 10955, 13930, 21910, 27860, 43820, 62287, 124574, 249148, 311435, 436009, 622870, 872018, 1245740, 1744036, 2180045, 4360090, 8720180]

約数ペア:

[(1, 8720180), (2, 4360090), (4, 2180045), (5, 1744036), (7, 1245740), (10, 872018), (14, 622870), (20, 436009), (28, 311435), (35, 249148), (70, 124574), (140, 62287), (199, 43820), (313, 27860), (398, 21910), (626, 13930), (796, 10955), (995, 8764), (1252, 6965), (1393, 6260), (1565, 5572), (1990, 4382), (2191, 3980), (2786, 3130)]