168400840

素因数分解:

$2^3\times 5^1\times {\mathrm{4210021}}^1$

素因数の和:4210032

約数の個数: 16

約数和(自身を含む): 378901980

約数和(自身を除く): 210501140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 4210021, 8420042, 16840084, 21050105, 33680168, 42100210, 84200420, 168400840]

約数ペア:

[(1, 168400840), (2, 84200420), (4, 42100210), (5, 33680168), (8, 21050105), (10, 16840084), (20, 8420042), (40, 4210021)]