18978220

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{41257}}^1$

素因数の和:41289

約数の個数: 24

約数和(自身を含む): 41588064

約数和(自身を除く): 22609844

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 92, 115, 230, 460, 41257, 82514, 165028, 206285, 412570, 825140, 948911, 1897822, 3795644, 4744555, 9489110, 18978220]

約数ペア:

[(1, 18978220), (2, 9489110), (4, 4744555), (5, 3795644), (10, 1897822), (20, 948911), (23, 825140), (46, 412570), (92, 206285), (115, 165028), (230, 82514), (460, 41257)]