21813219

素因数分解:

$3^4\times {\mathrm{197}}^1\times {\mathrm{1367}}^1$

素因数の和:1576

約数の個数: 20

約数和(自身を含む): 32774544

約数和(自身を除く): 10961325

約数列:

[1, 3, 9, 27, 81, 197, 591, 1367, 1773, 4101, 5319, 12303, 15957, 36909, 110727, 269299, 807897, 2423691, 7271073, 21813219]

約数ペア:

[(1, 21813219), (3, 7271073), (9, 2423691), (27, 807897), (81, 269299), (197, 110727), (591, 36909), (1367, 15957), (1773, 12303), (4101, 5319)]