18212020

素因数分解:

$2^2\times 5^1\times {\mathrm{509}}^1\times {\mathrm{1789}}^1$

素因数の和:2307

約数の個数: 24

約数和(自身を含む): 38341800

約数和(自身を除く): 20129780

約数列:

[1, 2, 4, 5, 10, 20, 509, 1018, 1789, 2036, 2545, 3578, 5090, 7156, 8945, 10180, 17890, 35780, 910601, 1821202, 3642404, 4553005, 9106010, 18212020]

約数ペア:

[(1, 18212020), (2, 9106010), (4, 4553005), (5, 3642404), (10, 1821202), (20, 910601), (509, 35780), (1018, 17890), (1789, 10180), (2036, 8945), (2545, 7156), (3578, 5090)]