21507805

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{23003}}^1$

素因数の和:23036

約数の個数: 16

約数和(自身を含む): 29813184

約数和(自身を除く): 8305379

約数列:

[1, 5, 11, 17, 55, 85, 187, 935, 23003, 115015, 253033, 391051, 1265165, 1955255, 4301561, 21507805]

約数ペア:

[(1, 21507805), (5, 4301561), (11, 1955255), (17, 1265165), (55, 391051), (85, 253033), (187, 115015), (935, 23003)]