21490490

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{337}}^1\times {\mathrm{911}}^1$

素因数の和:1262

約数の個数: 32

約数和(自身を含む): 44388864

約数和(自身を除く): 22898374

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 337, 674, 911, 1685, 1822, 2359, 3370, 4555, 4718, 6377, 9110, 11795, 12754, 23590, 31885, 63770, 307007, 614014, 1535035, 2149049, 3070070, 4298098, 10745245, 21490490]

約数ペア:

[(1, 21490490), (2, 10745245), (5, 4298098), (7, 3070070), (10, 2149049), (14, 1535035), (35, 614014), (70, 307007), (337, 63770), (674, 31885), (911, 23590), (1685, 12754), (1822, 11795), (2359, 9110), (3370, 6377), (4555, 4718)]