81921020

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{95257}}^1$

素因数の和:95309

約数の個数: 24

約数和(自身を含む): 176036784

約数和(自身を除く): 94115764

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860, 95257, 190514, 381028, 476285, 952570, 1905140, 4096051, 8192102, 16384204, 20480255, 40960510, 81921020]

約数ペア:

[(1, 81921020), (2, 40960510), (4, 20480255), (5, 16384204), (10, 8192102), (20, 4096051), (43, 1905140), (86, 952570), (172, 476285), (215, 381028), (430, 190514), (860, 95257)]