81647905

素因数分解:

$5^1\times {\mathrm{29}}^1\times {\mathrm{139}}^1\times {\mathrm{4051}}^1$

素因数の和:4224

約数の個数: 16

約数和(自身を含む): 102110400

約数和(自身を除く): 20462495

約数列:

[1, 5, 29, 139, 145, 695, 4031, 4051, 20155, 20255, 117479, 563089, 587395, 2815445, 16329581, 81647905]

約数ペア:

[(1, 81647905), (5, 16329581), (29, 2815445), (139, 587395), (145, 563089), (695, 117479), (4031, 20255), (4051, 20155)]