21031257

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{12541}}^1$

素因数の和:12600

約数の個数: 16

約数和(自身を含む): 30903488

約数和(自身を除く): 9872231

約数列:

[1, 3, 13, 39, 43, 129, 559, 1677, 12541, 37623, 163033, 489099, 539263, 1617789, 7010419, 21031257]

約数ペア:

[(1, 21031257), (3, 7010419), (13, 1617789), (39, 539263), (43, 489099), (129, 163033), (559, 37623), (1677, 12541)]