21658288

素因数分解:

$2^4\times {\mathrm{251}}^1\times {\mathrm{5393}}^1$

素因数の和:5652

約数の個数: 20

約数和(自身を含む): 42137928

約数和(自身を除く): 20479640

約数列:

[1, 2, 4, 8, 16, 251, 502, 1004, 2008, 4016, 5393, 10786, 21572, 43144, 86288, 1353643, 2707286, 5414572, 10829144, 21658288]

約数ペア:

[(1, 21658288), (2, 10829144), (4, 5414572), (8, 2707286), (16, 1353643), (251, 86288), (502, 43144), (1004, 21572), (2008, 10786), (4016, 5393)]