21504427

素因数分解:

$7^1\times {\mathrm{47}}^1\times {\mathrm{163}}^1\times {\mathrm{401}}^1$

素因数の和:618

約数の個数: 16

約数和(自身を含む): 25316352

約数和(自身を除く): 3811925

約数列:

[1, 7, 47, 163, 329, 401, 1141, 2807, 7661, 18847, 53627, 65363, 131929, 457541, 3072061, 21504427]

約数ペア:

[(1, 21504427), (7, 3072061), (47, 457541), (163, 131929), (329, 65363), (401, 53627), (1141, 18847), (2807, 7661)]