18913640

素因数分解:

$2^3\times 5^1\times {\mathrm{227}}^1\times {\mathrm{2083}}^1$

素因数の和:2321

約数の個数: 32

約数和(自身を含む): 42763680

約数和(自身を除く): 23850040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 227, 454, 908, 1135, 1816, 2083, 2270, 4166, 4540, 8332, 9080, 10415, 16664, 20830, 41660, 83320, 472841, 945682, 1891364, 2364205, 3782728, 4728410, 9456820, 18913640]

約数ペア:

[(1, 18913640), (2, 9456820), (4, 4728410), (5, 3782728), (8, 2364205), (10, 1891364), (20, 945682), (40, 472841), (227, 83320), (454, 41660), (908, 20830), (1135, 16664), (1816, 10415), (2083, 9080), (2270, 8332), (4166, 4540)]