20997158

素因数分解:

$2^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{2683}}^1$

素因数の和:2748

約数の個数: 32

約数和(自身を含む): 39680256

約数和(自身を除く): 18683098

約数列:

[1, 2, 7, 13, 14, 26, 43, 86, 91, 182, 301, 559, 602, 1118, 2683, 3913, 5366, 7826, 18781, 34879, 37562, 69758, 115369, 230738, 244153, 488306, 807583, 1499797, 1615166, 2999594, 10498579, 20997158]

約数ペア:

[(1, 20997158), (2, 10498579), (7, 2999594), (13, 1615166), (14, 1499797), (26, 807583), (43, 488306), (86, 244153), (91, 230738), (182, 115369), (301, 69758), (559, 37562), (602, 34879), (1118, 18781), (2683, 7826), (3913, 5366)]