18122020

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{129443}}^1$

素因数の和:129459

約数の個数: 24

約数和(自身を含む): 43493184

約数和(自身を除く): 25371164

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 129443, 258886, 517772, 647215, 906101, 1294430, 1812202, 2588860, 3624404, 4530505, 9061010, 18122020]

約数ペア:

[(1, 18122020), (2, 9061010), (4, 4530505), (5, 3624404), (7, 2588860), (10, 1812202), (14, 1294430), (20, 906101), (28, 647215), (35, 517772), (70, 258886), (140, 129443)]