18002440

素因数分解:

$2^3\times 5^1\times {\mathrm{109}}^1\times {\mathrm{4129}}^1$

素因数の和:4249

約数の個数: 32

約数和(自身を含む): 40887000

約数和(自身を除く): 22884560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 109, 218, 436, 545, 872, 1090, 2180, 4129, 4360, 8258, 16516, 20645, 33032, 41290, 82580, 165160, 450061, 900122, 1800244, 2250305, 3600488, 4500610, 9001220, 18002440]

約数ペア:

[(1, 18002440), (2, 9001220), (4, 4500610), (5, 3600488), (8, 2250305), (10, 1800244), (20, 900122), (40, 450061), (109, 165160), (218, 82580), (436, 41290), (545, 33032), (872, 20645), (1090, 16516), (2180, 8258), (4129, 4360)]