18157220

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{8329}}^1$

素因数の和:8447

約数の個数: 24

約数和(自身を含む): 38484600

約数和(自身を除く): 20327380

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 8329, 16658, 33316, 41645, 83290, 166580, 907861, 1815722, 3631444, 4539305, 9078610, 18157220]

約数ペア:

[(1, 18157220), (2, 9078610), (4, 4539305), (5, 3631444), (10, 1815722), (20, 907861), (109, 166580), (218, 83290), (436, 41645), (545, 33316), (1090, 16658), (2180, 8329)]