21813905

素因数分解:

$5^1\times {\mathrm{37}}^1\times {\mathrm{61}}^1\times {\mathrm{1933}}^1$

素因数の和:2036

約数の個数: 16

約数和(自身を含む): 27339024

約数和(自身を除く): 5525119

約数列:

[1, 5, 37, 61, 185, 305, 1933, 2257, 9665, 11285, 71521, 117913, 357605, 589565, 4362781, 21813905]

約数ペア:

[(1, 21813905), (5, 4362781), (37, 589565), (61, 357605), (185, 117913), (305, 71521), (1933, 11285), (2257, 9665)]