64396400

素因数分解:

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

素因数の和:1026

約数の個数: 60

約数和(自身を含む): 155682000

約数和(自身を除く): 91285600

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 199, 200, 398, 400, 796, 809, 995, 1592, 1618, 1990, 3184, 3236, 3980, 4045, 4975, 6472, 7960, 8090, 9950, 12944, 15920, 16180, 19900, 20225, 32360, 39800, 40450, 64720, 79600, 80900, 160991, 161800, 321982, 323600, 643964, 804955, 1287928, 1609910, 2575856, 3219820, 4024775, 6439640, 8049550, 12879280, 16099100, 32198200, 64396400]

約数ペア:

[(1, 64396400), (2, 32198200), (4, 16099100), (5, 12879280), (8, 8049550), (10, 6439640), (16, 4024775), (20, 3219820), (25, 2575856), (40, 1609910), (50, 1287928), (80, 804955), (100, 643964), (199, 323600), (200, 321982), (398, 161800), (400, 160991), (796, 80900), (809, 79600), (995, 64720), (1592, 40450), (1618, 39800), (1990, 32360), (3184, 20225), (3236, 19900), (3980, 16180), (4045, 15920), (4975, 12944), (6472, 9950), (7960, 8090)]