21280408

素因数分解:

$2^3\times {\mathrm{157}}^1\times {\mathrm{16943}}^1$

素因数の和:17106

約数の個数: 16

約数和(自身を含む): 40157280

約数和(自身を除く): 18876872

約数列:

[1, 2, 4, 8, 157, 314, 628, 1256, 16943, 33886, 67772, 135544, 2660051, 5320102, 10640204, 21280408]

約数ペア:

[(1, 21280408), (2, 10640204), (4, 5320102), (8, 2660051), (157, 135544), (314, 67772), (628, 33886), (1256, 16943)]