21251811

素因数分解:

$3^1\times 7^1\times {\mathrm{661}}^1\times {\mathrm{1531}}^1$

素因数の和:2202

約数の個数: 16

約数和(自身を含む): 32453888

約数和(自身を除く): 11202077

約数列:

[1, 3, 7, 21, 661, 1531, 1983, 4593, 4627, 10717, 13881, 32151, 1011991, 3035973, 7083937, 21251811]

約数ペア:

[(1, 21251811), (3, 7083937), (7, 3035973), (21, 1011991), (661, 32151), (1531, 13881), (1983, 10717), (4593, 4627)]