20991003

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{137}}^1\times {\mathrm{4643}}^1$

素因数の和:4794

約数の個数: 16

約数和(自身を含む): 30761856

約数和(自身を除く): 9770853

約数列:

[1, 3, 11, 33, 137, 411, 1507, 4521, 4643, 13929, 51073, 153219, 636091, 1908273, 6997001, 20991003]

約数ペア:

[(1, 20991003), (3, 6997001), (11, 1908273), (33, 636091), (137, 153219), (411, 51073), (1507, 13929), (4521, 4643)]