19826821

素因数分解:

$7^2\times {\mathrm{41}}^1\times {\mathrm{71}}^1\times {\mathrm{139}}^1$

素因数の和:265

約数の個数: 24

約数和(自身を含む): 24131520

約数和(自身を除く): 4304699

約数列:

[1, 7, 41, 49, 71, 139, 287, 497, 973, 2009, 2911, 3479, 5699, 6811, 9869, 20377, 39893, 69083, 142639, 279251, 404629, 483581, 2832403, 19826821]

約数ペア:

[(1, 19826821), (7, 2832403), (41, 483581), (49, 404629), (71, 279251), (139, 142639), (287, 69083), (497, 39893), (973, 20377), (2009, 9869), (2911, 6811), (3479, 5699)]