81685168

素因数分解:

$2^4\times {\mathrm{163}}^1\times {\mathrm{31321}}^1$

素因数の和:31492

約数の個数: 20

約数和(自身を含む): 159241048

約数和(自身を除く): 77555880

約数列:

[1, 2, 4, 8, 16, 163, 326, 652, 1304, 2608, 31321, 62642, 125284, 250568, 501136, 5105323, 10210646, 20421292, 40842584, 81685168]

約数ペア:

[(1, 81685168), (2, 40842584), (4, 20421292), (8, 10210646), (16, 5105323), (163, 501136), (326, 250568), (652, 125284), (1304, 62642), (2608, 31321)]