21815105

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{163}}^1$

素因数の和:281

約数の個数: 32

約数和(自身を含む): 29756160

約数和(自身を除く): 7941055

約数列:

[1, 5, 13, 29, 65, 71, 145, 163, 355, 377, 815, 923, 1885, 2059, 2119, 4615, 4727, 10295, 10595, 11573, 23635, 26767, 57865, 61451, 133835, 150449, 307255, 335617, 752245, 1678085, 4363021, 21815105]

約数ペア:

[(1, 21815105), (5, 4363021), (13, 1678085), (29, 752245), (65, 335617), (71, 307255), (145, 150449), (163, 133835), (355, 61451), (377, 57865), (815, 26767), (923, 23635), (1885, 11573), (2059, 10595), (2119, 10295), (4615, 4727)]