21969591

素因数分解:

$3^1\times 7^2\times {\mathrm{103}}^1\times {\mathrm{1451}}^1$

素因数の和:1571

約数の個数: 24

約数和(自身を含む): 34429824

約数和(自身を除く): 12460233

約数列:

[1, 3, 7, 21, 49, 103, 147, 309, 721, 1451, 2163, 4353, 5047, 10157, 15141, 30471, 71099, 149453, 213297, 448359, 1046171, 3138513, 7323197, 21969591]

約数ペア:

[(1, 21969591), (3, 7323197), (7, 3138513), (21, 1046171), (49, 448359), (103, 213297), (147, 149453), (309, 71099), (721, 30471), (1451, 15141), (2163, 10157), (4353, 5047)]