20502237

素因数分解:

$3^1\times 7^2\times {\mathrm{211}}^1\times {\mathrm{661}}^1$

素因数の和:889

約数の個数: 24

約数和(自身を含む): 31998432

約数和(自身を除く): 11496195

約数列:

[1, 3, 7, 21, 49, 147, 211, 633, 661, 1477, 1983, 4431, 4627, 10339, 13881, 31017, 32389, 97167, 139471, 418413, 976297, 2928891, 6834079, 20502237]

約数ペア:

[(1, 20502237), (3, 6834079), (7, 2928891), (21, 976297), (49, 418413), (147, 139471), (211, 97167), (633, 32389), (661, 31017), (1477, 13881), (1983, 10339), (4431, 4627)]