21993769

素因数分解:

$7^1\times {\mathrm{43}}^1\times {\mathrm{89}}^1\times {\mathrm{821}}^1$

素因数の和:960

約数の個数: 16

約数和(自身を含む): 26040960

約数和(自身を除く): 4047191

約数列:

[1, 7, 43, 89, 301, 623, 821, 3827, 5747, 26789, 35303, 73069, 247121, 511483, 3141967, 21993769]

約数ペア:

[(1, 21993769), (7, 3141967), (43, 511483), (89, 247121), (301, 73069), (623, 35303), (821, 26789), (3827, 5747)]