81216340

素因数分解:

$2^2\times 5^1\times {\mathrm{137}}^1\times {\mathrm{29641}}^1$

素因数の和:29787

約数の個数: 24

約数和(自身を含む): 171805032

約数和(自身を除く): 90588692

約数列:

[1, 2, 4, 5, 10, 20, 137, 274, 548, 685, 1370, 2740, 29641, 59282, 118564, 148205, 296410, 592820, 4060817, 8121634, 16243268, 20304085, 40608170, 81216340]

約数ペア:

[(1, 81216340), (2, 40608170), (4, 20304085), (5, 16243268), (10, 8121634), (20, 4060817), (137, 592820), (274, 296410), (548, 148205), (685, 118564), (1370, 59282), (2740, 29641)]