20997918

素因数分解:

$2^1\times 3^2\times {\mathrm{313}}^1\times {\mathrm{3727}}^1$

素因数の和:4048

約数の個数: 24

約数和(自身を含む): 45653088

約数和(自身を除く): 24655170

約数列:

[1, 2, 3, 6, 9, 18, 313, 626, 939, 1878, 2817, 3727, 5634, 7454, 11181, 22362, 33543, 67086, 1166551, 2333102, 3499653, 6999306, 10498959, 20997918]

約数ペア:

[(1, 20997918), (2, 10498959), (3, 6999306), (6, 3499653), (9, 2333102), (18, 1166551), (313, 67086), (626, 33543), (939, 22362), (1878, 11181), (2817, 7454), (3727, 5634)]