21084865

素因数分解:

$5^1\times {\mathrm{41}}^1\times {\mathrm{163}}^1\times {\mathrm{631}}^1$

素因数の和:840

約数の個数: 16

約数和(自身を含む): 26119296

約数和(自身を除く): 5034431

約数列:

[1, 5, 41, 163, 205, 631, 815, 3155, 6683, 25871, 33415, 102853, 129355, 514265, 4216973, 21084865]

約数ペア:

[(1, 21084865), (5, 4216973), (41, 514265), (163, 129355), (205, 102853), (631, 33415), (815, 25871), (3155, 6683)]