21080490772

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{43554733}}^1$

素因数の和:43554759

約数の個数: 18

約数和(自身を含む): 40549457354

約数和(自身を除く): 19468966582

約数列:

[1, 2, 4, 11, 22, 44, 121, 242, 484, 43554733, 87109466, 174218932, 479102063, 958204126, 1916408252, 5270122693, 10540245386, 21080490772]

約数ペア:

[(1, 21080490772), (2, 10540245386), (4, 5270122693), (11, 1916408252), (22, 958204126), (44, 479102063), (121, 174218932), (242, 87109466), (484, 43554733)]