21504819

素因数分解:

$3^1\times 7^1\times {\mathrm{101}}^1\times {\mathrm{10139}}^1$

素因数の和:10250

約数の個数: 16

約数和(自身を含む): 33096960

約数和(自身を除く): 11592141

約数列:

[1, 3, 7, 21, 101, 303, 707, 2121, 10139, 30417, 70973, 212919, 1024039, 3072117, 7168273, 21504819]

約数ペア:

[(1, 21504819), (3, 7168273), (7, 3072117), (21, 1024039), (101, 212919), (303, 70973), (707, 30417), (2121, 10139)]