18907893

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{123581}}^1$

素因数の和:123604

約数の個数: 12

約数和(自身を含む): 28918188

約数和(自身を除く): 10010295

約数列:

[1, 3, 9, 17, 51, 153, 123581, 370743, 1112229, 2100877, 6302631, 18907893]

約数ペア:

[(1, 18907893), (3, 6302631), (9, 2100877), (17, 1112229), (51, 370743), (153, 123581)]