21804805

素因数分解:

$5^1\times {\mathrm{11}}^2\times {\mathrm{23}}^1\times {\mathrm{1567}}^1$

素因数の和:1617

約数の個数: 24

約数和(自身を含む): 30030336

約数和(自身を除く): 8225531

約数列:

[1, 5, 11, 23, 55, 115, 121, 253, 605, 1265, 1567, 2783, 7835, 13915, 17237, 36041, 86185, 180205, 189607, 396451, 948035, 1982255, 4360961, 21804805]

約数ペア:

[(1, 21804805), (5, 4360961), (11, 1982255), (23, 948035), (55, 396451), (115, 189607), (121, 180205), (253, 86185), (605, 36041), (1265, 17237), (1567, 13915), (2783, 7835)]