18538805

素因数分解:

$5^1\times {\mathrm{23}}^2\times {\mathrm{43}}^1\times {\mathrm{163}}^1$

素因数の和:257

約数の個数: 24

約数和(自身を含む): 23942688

約数和(自身を除く): 5403883

約数列:

[1, 5, 23, 43, 115, 163, 215, 529, 815, 989, 2645, 3749, 4945, 7009, 18745, 22747, 35045, 86227, 113735, 161207, 431135, 806035, 3707761, 18538805]

約数ペア:

[(1, 18538805), (5, 3707761), (23, 806035), (43, 431135), (115, 161207), (163, 113735), (215, 86227), (529, 35045), (815, 22747), (989, 18745), (2645, 7009), (3749, 4945)]