81289145

素因数分解:

$5^1\times 7^1\times {\mathrm{103}}^1\times {\mathrm{22549}}^1$

素因数の和:22664

約数の個数: 16

約数和(自身を含む): 112569600

約数和(自身を除く): 31280455

約数列:

[1, 5, 7, 35, 103, 515, 721, 3605, 22549, 112745, 157843, 789215, 2322547, 11612735, 16257829, 81289145]

約数ペア:

[(1, 81289145), (5, 16257829), (7, 11612735), (35, 2322547), (103, 789215), (515, 157843), (721, 112745), (3605, 22549)]