19957640

素因数分解:

$2^3\times 5^1\times {\mathrm{107}}^1\times {\mathrm{4663}}^1$

素因数の和:4781

約数の個数: 32

約数和(自身を含む): 45334080

約数和(自身を除く): 25376440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 107, 214, 428, 535, 856, 1070, 2140, 4280, 4663, 9326, 18652, 23315, 37304, 46630, 93260, 186520, 498941, 997882, 1995764, 2494705, 3991528, 4989410, 9978820, 19957640]

約数ペア:

[(1, 19957640), (2, 9978820), (4, 4989410), (5, 3991528), (8, 2494705), (10, 1995764), (20, 997882), (40, 498941), (107, 186520), (214, 93260), (428, 46630), (535, 37304), (856, 23315), (1070, 18652), (2140, 9326), (4280, 4663)]