81742160

素因数分解:

$2^4\times 5^1\times {\mathrm{1021777}}^1$

素因数の和:1021790

約数の個数: 20

約数和(自身を含む): 190050708

約数和(自身を除く): 108308548

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1021777, 2043554, 4087108, 5108885, 8174216, 10217770, 16348432, 20435540, 40871080, 81742160]

約数ペア:

[(1, 81742160), (2, 40871080), (4, 20435540), (5, 16348432), (8, 10217770), (10, 8174216), (16, 5108885), (20, 4087108), (40, 2043554), (80, 1021777)]