20825915

素因数分解:

$5^1\times {\mathrm{11}}^2\times {\mathrm{29}}^1\times {\mathrm{1187}}^1$

素因数の和:1243

約数の個数: 24

約数和(自身を含む): 28440720

約数和(自身を除く): 7614805

約数列:

[1, 5, 11, 29, 55, 121, 145, 319, 605, 1187, 1595, 3509, 5935, 13057, 17545, 34423, 65285, 143627, 172115, 378653, 718135, 1893265, 4165183, 20825915]

約数ペア:

[(1, 20825915), (5, 4165183), (11, 1893265), (29, 718135), (55, 378653), (121, 172115), (145, 143627), (319, 65285), (605, 34423), (1187, 17545), (1595, 13057), (3509, 5935)]