81204505

素因数分解:

$5^1\times {\mathrm{101}}^1\times {\mathrm{401}}^2$

素因数の和:908

約数の個数: 12

約数和(自身を含む): 98656236

約数和(自身を除く): 17451731

約数列:

[1, 5, 101, 401, 505, 2005, 40501, 160801, 202505, 804005, 16240901, 81204505]

約数ペア:

[(1, 81204505), (5, 16240901), (101, 804005), (401, 202505), (505, 160801), (2005, 40501)]