81563945

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1\times {\mathrm{6661}}^1$

素因数の和:6776

約数の個数: 16

約数和(自身を含む): 102328320

約数和(自身を除く): 20764375

約数列:

[1, 5, 31, 79, 155, 395, 2449, 6661, 12245, 33305, 206491, 526219, 1032455, 2631095, 16312789, 81563945]

約数ペア:

[(1, 81563945), (5, 16312789), (31, 2631095), (79, 1032455), (155, 526219), (395, 206491), (2449, 33305), (6661, 12245)]