18987657

素因数分解:

$3^1\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{2203}}^1$

素因数の和:2249

約数の個数: 24

約数和(自身を含む): 29039904

約数和(自身を除く): 10052247

約数列:

[1, 3, 13, 17, 39, 51, 169, 221, 507, 663, 2203, 2873, 6609, 8619, 28639, 37451, 85917, 112353, 372307, 486863, 1116921, 1460589, 6329219, 18987657]

約数ペア:

[(1, 18987657), (3, 6329219), (13, 1460589), (17, 1116921), (39, 486863), (51, 372307), (169, 112353), (221, 85917), (507, 37451), (663, 28639), (2203, 8619), (2873, 6609)]