18871280

素因数分解:

$2^4\times 5^1\times {\mathrm{235891}}^1$

素因数の和:235904

約数の個数: 20

約数和(自身を含む): 43875912

約数和(自身を除く): 25004632

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 235891, 471782, 943564, 1179455, 1887128, 2358910, 3774256, 4717820, 9435640, 18871280]

約数ペア:

[(1, 18871280), (2, 9435640), (4, 4717820), (5, 3774256), (8, 2358910), (10, 1887128), (16, 1179455), (20, 943564), (40, 471782), (80, 235891)]