18987716

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{397}}^1\times {\mathrm{1087}}^1$

素因数の和:1499

約数の個数: 24

約数和(自身を含む): 36374016

約数和(自身を除く): 17386300

約数列:

[1, 2, 4, 11, 22, 44, 397, 794, 1087, 1588, 2174, 4348, 4367, 8734, 11957, 17468, 23914, 47828, 431539, 863078, 1726156, 4746929, 9493858, 18987716]

約数ペア:

[(1, 18987716), (2, 9493858), (4, 4746929), (11, 1726156), (22, 863078), (44, 431539), (397, 47828), (794, 23914), (1087, 17468), (1588, 11957), (2174, 8734), (4348, 4367)]