39870020

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{18289}}^1$

素因数の和:18407

約数の個数: 24

約数和(自身を含む): 84499800

約数和(自身を除く): 44629780

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 18289, 36578, 73156, 91445, 182890, 365780, 1993501, 3987002, 7974004, 9967505, 19935010, 39870020]

約数ペア:

[(1, 39870020), (2, 19935010), (4, 9967505), (5, 7974004), (10, 3987002), (20, 1993501), (109, 365780), (218, 182890), (436, 91445), (545, 73156), (1090, 36578), (2180, 18289)]