20980155

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{199811}}^1$

素因数の和:199826

約数の個数: 16

約数和(自身を含む): 38363904

約数和(自身を除く): 17383749

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 199811, 599433, 999055, 1398677, 2997165, 4196031, 6993385, 20980155]

約数ペア:

[(1, 20980155), (3, 6993385), (5, 4196031), (7, 2997165), (15, 1398677), (21, 999055), (35, 599433), (105, 199811)]