6439640

素因数分解:

$2^3\times 5^1\times {\mathrm{199}}^1\times {\mathrm{809}}^1$

素因数の和:1019

約数の個数: 32

約数和(自身を含む): 14580000

約数和(自身を除く): 8140360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 199, 398, 796, 809, 995, 1592, 1618, 1990, 3236, 3980, 4045, 6472, 7960, 8090, 16180, 32360, 160991, 321982, 643964, 804955, 1287928, 1609910, 3219820, 6439640]

約数ペア:

[(1, 6439640), (2, 3219820), (4, 1609910), (5, 1287928), (8, 804955), (10, 643964), (20, 321982), (40, 160991), (199, 32360), (398, 16180), (796, 8090), (809, 7960), (995, 6472), (1592, 4045), (1618, 3980), (1990, 3236)]