78364720

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{19991}}^1$

素因数の和:20018

約数の個数: 60

約数和(自身を含む): 211955184

約数和(自身を除く): 133590464

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 49, 56, 70, 80, 98, 112, 140, 196, 245, 280, 392, 490, 560, 784, 980, 1960, 3920, 19991, 39982, 79964, 99955, 139937, 159928, 199910, 279874, 319856, 399820, 559748, 699685, 799640, 979559, 1119496, 1399370, 1599280, 1959118, 2238992, 2798740, 3918236, 4897795, 5597480, 7836472, 9795590, 11194960, 15672944, 19591180, 39182360, 78364720]

約数ペア:

[(1, 78364720), (2, 39182360), (4, 19591180), (5, 15672944), (7, 11194960), (8, 9795590), (10, 7836472), (14, 5597480), (16, 4897795), (20, 3918236), (28, 2798740), (35, 2238992), (40, 1959118), (49, 1599280), (56, 1399370), (70, 1119496), (80, 979559), (98, 799640), (112, 699685), (140, 559748), (196, 399820), (245, 319856), (280, 279874), (392, 199910), (490, 159928), (560, 139937), (784, 99955), (980, 79964), (1960, 39982), (3920, 19991)]