18120880

素因数分解:

$2^4\times 5^1\times {\mathrm{226511}}^1$

素因数の和:226524

約数の個数: 20

約数和(自身を含む): 42131232

約数和(自身を除く): 24010352

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 226511, 453022, 906044, 1132555, 1812088, 2265110, 3624176, 4530220, 9060440, 18120880]

約数ペア:

[(1, 18120880), (2, 9060440), (4, 4530220), (5, 3624176), (8, 2265110), (10, 1812088), (16, 1132555), (20, 906044), (40, 453022), (80, 226511)]