81909505

素因数分解:

$5^1\times {\mathrm{71}}^1\times {\mathrm{179}}^1\times {\mathrm{1289}}^1$

素因数の和:1544

約数の個数: 16

約数和(自身を含む): 100310400

約数和(自身を除く): 18400895

約数列:

[1, 5, 71, 179, 355, 895, 1289, 6445, 12709, 63545, 91519, 230731, 457595, 1153655, 16381901, 81909505]

約数ペア:

[(1, 81909505), (5, 16381901), (71, 1153655), (179, 457595), (355, 230731), (895, 91519), (1289, 63545), (6445, 12709)]