21213894

素因数分解:

$2^1\times 3^1\times {\mathrm{13}}^2\times {\mathrm{20921}}^1$

素因数の和:20952

約数の個数: 24

約数和(自身を含む): 45944712

約数和(自身を除く): 24730818

約数列:

[1, 2, 3, 6, 13, 26, 39, 78, 169, 338, 507, 1014, 20921, 41842, 62763, 125526, 271973, 543946, 815919, 1631838, 3535649, 7071298, 10606947, 21213894]

約数ペア:

[(1, 21213894), (2, 10606947), (3, 7071298), (6, 3535649), (13, 1631838), (26, 815919), (39, 543946), (78, 271973), (169, 125526), (338, 62763), (507, 41842), (1014, 20921)]