21169281

素因数分解:

$3^1\times 7^1\times {\mathrm{103}}^1\times {\mathrm{9787}}^1$

素因数の和:9900

約数の個数: 16

約数和(自身を含む): 32574464

約数和(自身を除く): 11405183

約数列:

[1, 3, 7, 21, 103, 309, 721, 2163, 9787, 29361, 68509, 205527, 1008061, 3024183, 7056427, 21169281]

約数ペア:

[(1, 21169281), (3, 7056427), (7, 3024183), (21, 1008061), (103, 205527), (309, 68509), (721, 29361), (2163, 9787)]