21138003

素因数分解:

$3^4\times {\mathrm{163}}^1\times {\mathrm{1601}}^1$

素因数の和:1776

約数の個数: 20

約数和(自身を含む): 31790088

約数和(自身を除く): 10652085

約数列:

[1, 3, 9, 27, 81, 163, 489, 1467, 1601, 4401, 4803, 13203, 14409, 43227, 129681, 260963, 782889, 2348667, 7046001, 21138003]

約数ペア:

[(1, 21138003), (3, 7046001), (9, 2348667), (27, 782889), (81, 260963), (163, 129681), (489, 43227), (1467, 14409), (1601, 13203), (4401, 4803)]