18978640

素因数分解:

$2^4\times 5^1\times {\mathrm{237233}}^1$

素因数の和:237246

約数の個数: 20

約数和(自身を含む): 44125524

約数和(自身を除く): 25146884

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 237233, 474466, 948932, 1186165, 1897864, 2372330, 3795728, 4744660, 9489320, 18978640]

約数ペア:

[(1, 18978640), (2, 9489320), (4, 4744660), (5, 3795728), (8, 2372330), (10, 1897864), (16, 1186165), (20, 948932), (40, 474466), (80, 237233)]