21373121

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{197}}^1\times {\mathrm{1409}}^1$

素因数の和:1624

約数の個数: 16

約数和(自身を含む): 26801280

約数和(自身を除く): 5428159

約数列:

[1, 7, 11, 77, 197, 1379, 1409, 2167, 9863, 15169, 15499, 108493, 277573, 1943011, 3053303, 21373121]

約数ペア:

[(1, 21373121), (7, 3053303), (11, 1943011), (77, 277573), (197, 108493), (1379, 15499), (1409, 15169), (2167, 9863)]