21728080

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{24691}}^1$

素因数の和:24715

約数の個数: 40

約数和(自身を含む): 55112544

約数和(自身を除く): 33384464

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 220, 440, 880, 24691, 49382, 98764, 123455, 197528, 246910, 271601, 395056, 493820, 543202, 987640, 1086404, 1358005, 1975280, 2172808, 2716010, 4345616, 5432020, 10864040, 21728080]

約数ペア:

[(1, 21728080), (2, 10864040), (4, 5432020), (5, 4345616), (8, 2716010), (10, 2172808), (11, 1975280), (16, 1358005), (20, 1086404), (22, 987640), (40, 543202), (44, 493820), (55, 395056), (80, 271601), (88, 246910), (110, 197528), (176, 123455), (220, 98764), (440, 49382), (880, 24691)]