81886540

素因数分解:

$2^2\times 5^1\times {\mathrm{821}}^1\times {\mathrm{4987}}^1$

素因数の和:5817

約数の個数: 24

約数和(自身を含む): 172205712

約数和(自身を除く): 90319172

約数列:

[1, 2, 4, 5, 10, 20, 821, 1642, 3284, 4105, 4987, 8210, 9974, 16420, 19948, 24935, 49870, 99740, 4094327, 8188654, 16377308, 20471635, 40943270, 81886540]

約数ペア:

[(1, 81886540), (2, 40943270), (4, 20471635), (5, 16377308), (10, 8188654), (20, 4094327), (821, 99740), (1642, 49870), (3284, 24935), (4105, 19948), (4987, 16420), (8210, 9974)]