21399896

素因数分解:

$2^3\times 7^1\times {\mathrm{43}}^1\times {\mathrm{8887}}^1$

素因数の和:8943

約数の個数: 32

約数和(自身を含む): 46928640

約数和(自身を除く): 25528744

約数列:

[1, 2, 4, 7, 8, 14, 28, 43, 56, 86, 172, 301, 344, 602, 1204, 2408, 8887, 17774, 35548, 62209, 71096, 124418, 248836, 382141, 497672, 764282, 1528564, 2674987, 3057128, 5349974, 10699948, 21399896]

約数ペア:

[(1, 21399896), (2, 10699948), (4, 5349974), (7, 3057128), (8, 2674987), (14, 1528564), (28, 764282), (43, 497672), (56, 382141), (86, 248836), (172, 124418), (301, 71096), (344, 62209), (602, 35548), (1204, 17774), (2408, 8887)]