18216080

素因数分解:

$2^4\times 5^1\times {\mathrm{109}}^1\times {\mathrm{2089}}^1$

素因数の和:2211

約数の個数: 40

約数和(自身を含む): 42761400

約数和(自身を除く): 24545320

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 109, 218, 436, 545, 872, 1090, 1744, 2089, 2180, 4178, 4360, 8356, 8720, 10445, 16712, 20890, 33424, 41780, 83560, 167120, 227701, 455402, 910804, 1138505, 1821608, 2277010, 3643216, 4554020, 9108040, 18216080]

約数ペア:

[(1, 18216080), (2, 9108040), (4, 4554020), (5, 3643216), (8, 2277010), (10, 1821608), (16, 1138505), (20, 910804), (40, 455402), (80, 227701), (109, 167120), (218, 83560), (436, 41780), (545, 33424), (872, 20890), (1090, 16712), (1744, 10445), (2089, 8720), (2180, 8356), (4178, 4360)]