18288020

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{8389}}^1$

素因数の和:8507

約数の個数: 24

約数和(自身を含む): 38761800

約数和(自身を除く): 20473780

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 8389, 16778, 33556, 41945, 83890, 167780, 914401, 1828802, 3657604, 4572005, 9144010, 18288020]

約数ペア:

[(1, 18288020), (2, 9144010), (4, 4572005), (5, 3657604), (10, 1828802), (20, 914401), (109, 167780), (218, 83890), (436, 41945), (545, 33556), (1090, 16778), (2180, 8389)]