390040

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{199}}^1$

素因数の和:224

約数の個数: 48

約数和(自身を含む): 1026000

約数和(自身を除く): 635960

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 98, 140, 196, 199, 245, 280, 392, 398, 490, 796, 980, 995, 1393, 1592, 1960, 1990, 2786, 3980, 5572, 6965, 7960, 9751, 11144, 13930, 19502, 27860, 39004, 48755, 55720, 78008, 97510, 195020, 390040]

約数ペア:

[(1, 390040), (2, 195020), (4, 97510), (5, 78008), (7, 55720), (8, 48755), (10, 39004), (14, 27860), (20, 19502), (28, 13930), (35, 11144), (40, 9751), (49, 7960), (56, 6965), (70, 5572), (98, 3980), (140, 2786), (196, 1990), (199, 1960), (245, 1592), (280, 1393), (392, 995), (398, 980), (490, 796)]