21431739

素因数分解:

$3^1\times 7^1\times {\mathrm{739}}^1\times {\mathrm{1381}}^1$

素因数の和:2130

約数の個数: 16

約数和(自身を含む): 32725760

約数和(自身を除く): 11294021

約数列:

[1, 3, 7, 21, 739, 1381, 2217, 4143, 5173, 9667, 15519, 29001, 1020559, 3061677, 7143913, 21431739]

約数ペア:

[(1, 21431739), (3, 7143913), (7, 3061677), (21, 1020559), (739, 29001), (1381, 15519), (2217, 9667), (4143, 5173)]