21331385

素因数分解:

$5^1\times {\mathrm{29}}^1\times {\mathrm{131}}^1\times {\mathrm{1123}}^1$

素因数の和:1288

約数の個数: 16

約数和(自身を含む): 26706240

約数和(自身を除く): 5374855

約数列:

[1, 5, 29, 131, 145, 655, 1123, 3799, 5615, 18995, 32567, 147113, 162835, 735565, 4266277, 21331385]

約数ペア:

[(1, 21331385), (5, 4266277), (29, 735565), (131, 162835), (145, 147113), (655, 32567), (1123, 18995), (3799, 5615)]