21281095

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{16823}}^1$

素因数の和:16862

約数の個数: 16

約数和(自身を含む): 29071872

約数和(自身を除く): 7790777

約数列:

[1, 5, 11, 23, 55, 115, 253, 1265, 16823, 84115, 185053, 386929, 925265, 1934645, 4256219, 21281095]

約数ペア:

[(1, 21281095), (5, 4256219), (11, 1934645), (23, 925265), (55, 386929), (115, 185053), (253, 84115), (1265, 16823)]