21557193

素因数分解:

$3^1\times 7^1\times {\mathrm{661}}^1\times {\mathrm{1553}}^1$

素因数の和:2224

約数の個数: 16

約数和(自身を含む): 32919936

約数和(自身を除く): 11362743

約数列:

[1, 3, 7, 21, 661, 1553, 1983, 4627, 4659, 10871, 13881, 32613, 1026533, 3079599, 7185731, 21557193]

約数ペア:

[(1, 21557193), (3, 7185731), (7, 3079599), (21, 1026533), (661, 32613), (1553, 13881), (1983, 10871), (4627, 4659)]