81445475

素因数分解:

$5^2\times {\mathrm{41}}^1\times {\mathrm{181}}^1\times {\mathrm{439}}^1$

素因数の和:671

約数の個数: 24

約数和(自身を含む): 104264160

約数和(自身を除く): 22818685

約数列:

[1, 5, 25, 41, 181, 205, 439, 905, 1025, 2195, 4525, 7421, 10975, 17999, 37105, 79459, 89995, 185525, 397295, 449975, 1986475, 3257819, 16289095, 81445475]

約数ペア:

[(1, 81445475), (5, 16289095), (25, 3257819), (41, 1986475), (181, 449975), (205, 397295), (439, 185525), (905, 89995), (1025, 79459), (2195, 37105), (4525, 17999), (7421, 10975)]