18212980

素因数分解:

$2^2\times 5^1\times {\mathrm{389}}^1\times {\mathrm{2341}}^1$

素因数の和:2739

約数の個数: 24

約数和(自身を含む): 38361960

約数和(自身を除く): 20148980

約数列:

[1, 2, 4, 5, 10, 20, 389, 778, 1556, 1945, 2341, 3890, 4682, 7780, 9364, 11705, 23410, 46820, 910649, 1821298, 3642596, 4553245, 9106490, 18212980]

約数ペア:

[(1, 18212980), (2, 9106490), (4, 4553245), (5, 3642596), (10, 1821298), (20, 910649), (389, 46820), (778, 23410), (1556, 11705), (1945, 9364), (2341, 7780), (3890, 4682)]