21091413

素因数分解:

$3^1\times 7^3\times {\mathrm{103}}^1\times {\mathrm{199}}^1$

素因数の和:326

約数の個数: 32

約数和(自身を含む): 33280000

約数和(自身を除く): 12188587

約数列:

[1, 3, 7, 21, 49, 103, 147, 199, 309, 343, 597, 721, 1029, 1393, 2163, 4179, 5047, 9751, 15141, 20497, 29253, 35329, 61491, 68257, 105987, 143479, 204771, 430437, 1004353, 3013059, 7030471, 21091413]

約数ペア:

[(1, 21091413), (3, 7030471), (7, 3013059), (21, 1004353), (49, 430437), (103, 204771), (147, 143479), (199, 105987), (309, 68257), (343, 61491), (597, 35329), (721, 29253), (1029, 20497), (1393, 15141), (2163, 9751), (4179, 5047)]