28098020

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{12889}}^1$

素因数の和:13007

約数の個数: 24

約数和(自身を含む): 59551800

約数和(自身を除く): 31453780

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 12889, 25778, 51556, 64445, 128890, 257780, 1404901, 2809802, 5619604, 7024505, 14049010, 28098020]

約数ペア:

[(1, 28098020), (2, 14049010), (4, 7024505), (5, 5619604), (10, 2809802), (20, 1404901), (109, 257780), (218, 128890), (436, 64445), (545, 51556), (1090, 25778), (2180, 12889)]