18291640

素因数分解:

$2^3\times 5^1\times {\mathrm{431}}^1\times {\mathrm{1061}}^1$

素因数の和:1503

約数の個数: 32

約数和(自身を含む): 41290560

約数和(自身を除く): 22998920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 431, 862, 1061, 1724, 2122, 2155, 3448, 4244, 4310, 5305, 8488, 8620, 10610, 17240, 21220, 42440, 457291, 914582, 1829164, 2286455, 3658328, 4572910, 9145820, 18291640]

約数ペア:

[(1, 18291640), (2, 9145820), (4, 4572910), (5, 3658328), (8, 2286455), (10, 1829164), (20, 914582), (40, 457291), (431, 42440), (862, 21220), (1061, 17240), (1724, 10610), (2122, 8620), (2155, 8488), (3448, 5305), (4244, 4310)]