19816881

素因数分解:

$3^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{13291}}^1$

素因数の和:13372

約数の個数: 16

約数和(自身を含む): 30624768

約数和(自身を除く): 10807887

約数列:

[1, 3, 7, 21, 71, 213, 497, 1491, 13291, 39873, 93037, 279111, 943661, 2830983, 6605627, 19816881]

約数ペア:

[(1, 19816881), (3, 6605627), (7, 2830983), (21, 943661), (71, 279111), (213, 93037), (497, 39873), (1491, 13291)]