21908085

素因数分解:

$3^1\times 5^1\times {\mathrm{409}}^1\times {\mathrm{3571}}^1$

素因数の和:3988

約数の個数: 16

約数和(自身を含む): 35148480

約数和(自身を除く): 13240395

約数列:

[1, 3, 5, 15, 409, 1227, 2045, 3571, 6135, 10713, 17855, 53565, 1460539, 4381617, 7302695, 21908085]

約数ペア:

[(1, 21908085), (3, 7302695), (5, 4381617), (15, 1460539), (409, 53565), (1227, 17855), (2045, 10713), (3571, 6135)]