21174748

素因数分解:

$2^2\times 7^1\times {\mathrm{43}}^2\times {\mathrm{409}}^1$

素因数の和:506

約数の個数: 36

約数和(自身を含む): 43463280

約数和(自身を除く): 22288532

約数列:

[1, 2, 4, 7, 14, 28, 43, 86, 172, 301, 409, 602, 818, 1204, 1636, 1849, 2863, 3698, 5726, 7396, 11452, 12943, 17587, 25886, 35174, 51772, 70348, 123109, 246218, 492436, 756241, 1512482, 3024964, 5293687, 10587374, 21174748]

約数ペア:

[(1, 21174748), (2, 10587374), (4, 5293687), (7, 3024964), (14, 1512482), (28, 756241), (43, 492436), (86, 246218), (172, 123109), (301, 70348), (409, 51772), (602, 35174), (818, 25886), (1204, 17587), (1636, 12943), (1849, 11452), (2863, 7396), (3698, 5726)]