21016919

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{73}}^1\times {\mathrm{3739}}^1$

素因数の和:3830

約数の個数: 16

約数和(自身を含む): 26568960

約数和(自身を除く): 5552041

約数列:

[1, 7, 11, 73, 77, 511, 803, 3739, 5621, 26173, 41129, 272947, 287903, 1910629, 3002417, 21016919]

約数ペア:

[(1, 21016919), (7, 3002417), (11, 1910629), (73, 287903), (77, 272947), (511, 41129), (803, 26173), (3739, 5621)]