21031983

素因数分解:

$3^2\times 7^1\times {\mathrm{47}}^1\times {\mathrm{7103}}^1$

素因数の和:7163

約数の個数: 24

約数和(自身を含む): 35463168

約数和(自身を除く): 14431185

約数列:

[1, 3, 7, 9, 21, 47, 63, 141, 329, 423, 987, 2961, 7103, 21309, 49721, 63927, 149163, 333841, 447489, 1001523, 2336887, 3004569, 7010661, 21031983]

約数ペア:

[(1, 21031983), (3, 7010661), (7, 3004569), (9, 2336887), (21, 1001523), (47, 447489), (63, 333841), (141, 149163), (329, 63927), (423, 49721), (987, 21309), (2961, 7103)]