21087619

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{227}}^1\times {\mathrm{577}}^1$

素因数の和:834

約数の個数: 16

約数和(自身を含む): 25302528

約数和(自身を除く): 4214909

約数列:

[1, 7, 23, 161, 227, 577, 1589, 4039, 5221, 13271, 36547, 92897, 130979, 916853, 3012517, 21087619]

約数ペア:

[(1, 21087619), (7, 3012517), (23, 916853), (161, 130979), (227, 92897), (577, 36547), (1589, 13271), (4039, 5221)]