20980100

素因数分解:

$2^2\times 5^2\times {\mathrm{209801}}^1$

素因数の和:209815

約数の個数: 18

約数和(自身を含む): 45527034

約数和(自身を除く): 24546934

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 209801, 419602, 839204, 1049005, 2098010, 4196020, 5245025, 10490050, 20980100]

約数ペア:

[(1, 20980100), (2, 10490050), (4, 5245025), (5, 4196020), (10, 2098010), (20, 1049005), (25, 839204), (50, 419602), (100, 209801)]