21684

素因数分解:

$2^2\times 3^1\times {\mathrm{13}}^1\times {\mathrm{139}}^1$

素因数の和:159

約数の個数: 24

約数和(自身を含む): 54880

約数和(自身を除く): 33196

約数列:

[1, 2, 3, 4, 6, 12, 13, 26, 39, 52, 78, 139, 156, 278, 417, 556, 834, 1668, 1807, 3614, 5421, 7228, 10842, 21684]

約数ペア:

[(1, 21684), (2, 10842), (3, 7228), (4, 5421), (6, 3614), (12, 1807), (13, 1668), (26, 834), (39, 556), (52, 417), (78, 278), (139, 156)]