18817660

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{21881}}^1$

素因数の和:21933

約数の個数: 24

約数和(自身を含む): 40437936

約数和(自身を除く): 21620276

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860, 21881, 43762, 87524, 109405, 218810, 437620, 940883, 1881766, 3763532, 4704415, 9408830, 18817660]

約数ペア:

[(1, 18817660), (2, 9408830), (4, 4704415), (5, 3763532), (10, 1881766), (20, 940883), (43, 437620), (86, 218810), (172, 109405), (215, 87524), (430, 43762), (860, 21881)]