18926578

素因数分解:

$2^1\times {\mathrm{11}}^2\times {\mathrm{197}}^1\times {\mathrm{397}}^1$

素因数の和:618

約数の個数: 24

約数和(自身を含む): 31442796

約数和(自身を除く): 12516218

約数列:

[1, 2, 11, 22, 121, 197, 242, 394, 397, 794, 2167, 4334, 4367, 8734, 23837, 47674, 48037, 78209, 96074, 156418, 860299, 1720598, 9463289, 18926578]

約数ペア:

[(1, 18926578), (2, 9463289), (11, 1720598), (22, 860299), (121, 156418), (197, 96074), (242, 78209), (394, 48037), (397, 47674), (794, 23837), (2167, 8734), (4334, 4367)]