21081543

素因数分解:

$3^1\times 7^1\times {\mathrm{991}}^1\times {\mathrm{1013}}^1$

素因数の和:2014

約数の個数: 16

約数和(自身を含む): 32188416

約数和(自身を除く): 11106873

約数列:

[1, 3, 7, 21, 991, 1013, 2973, 3039, 6937, 7091, 20811, 21273, 1003883, 3011649, 7027181, 21081543]

約数ペア:

[(1, 21081543), (3, 7027181), (7, 3011649), (21, 1003883), (991, 21273), (1013, 20811), (2973, 7091), (3039, 6937)]