21008449

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{251}}^1\times {\mathrm{1087}}^1$

素因数の和:1356

約数の個数: 16

約数和(自身を含む): 26320896

約数和(自身を除く): 5312447

約数列:

[1, 7, 11, 77, 251, 1087, 1757, 2761, 7609, 11957, 19327, 83699, 272837, 1909859, 3001207, 21008449]

約数ペア:

[(1, 21008449), (7, 3001207), (11, 1909859), (77, 272837), (251, 83699), (1087, 19327), (1757, 11957), (2761, 7609)]