12879280

素因数分解:

$2^4\times 5^1\times {\mathrm{199}}^1\times {\mathrm{809}}^1$

素因数の和:1021

約数の個数: 40

約数和(自身を含む): 30132000

約数和(自身を除く): 17252720

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 199, 398, 796, 809, 995, 1592, 1618, 1990, 3184, 3236, 3980, 4045, 6472, 7960, 8090, 12944, 15920, 16180, 32360, 64720, 160991, 321982, 643964, 804955, 1287928, 1609910, 2575856, 3219820, 6439640, 12879280]

約数ペア:

[(1, 12879280), (2, 6439640), (4, 3219820), (5, 2575856), (8, 1609910), (10, 1287928), (16, 804955), (20, 643964), (40, 321982), (80, 160991), (199, 64720), (398, 32360), (796, 16180), (809, 15920), (995, 12944), (1592, 8090), (1618, 7960), (1990, 6472), (3184, 4045), (3236, 3980)]