20819267

素因数分解:

$7^2\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{241}}^1$

素因数の和:339

約数の個数: 24

約数和(自身を含む): 25491312

約数和(自身を除く): 4672045

約数列:

[1, 7, 41, 43, 49, 241, 287, 301, 1687, 1763, 2009, 2107, 9881, 10363, 11809, 12341, 69167, 72541, 86387, 424883, 484169, 507787, 2974181, 20819267]

約数ペア:

[(1, 20819267), (7, 2974181), (41, 507787), (43, 484169), (49, 424883), (241, 86387), (287, 72541), (301, 69167), (1687, 12341), (1763, 11809), (2009, 10363), (2107, 9881)]