18198640

素因数分解:

$2^4\times 5^1\times {\mathrm{109}}^1\times {\mathrm{2087}}^1$

素因数の和:2209

約数の個数: 40

約数和(自身を含む): 42720480

約数和(自身を除く): 24521840

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 109, 218, 436, 545, 872, 1090, 1744, 2087, 2180, 4174, 4360, 8348, 8720, 10435, 16696, 20870, 33392, 41740, 83480, 166960, 227483, 454966, 909932, 1137415, 1819864, 2274830, 3639728, 4549660, 9099320, 18198640]

約数ペア:

[(1, 18198640), (2, 9099320), (4, 4549660), (5, 3639728), (8, 2274830), (10, 1819864), (16, 1137415), (20, 909932), (40, 454966), (80, 227483), (109, 166960), (218, 83480), (436, 41740), (545, 33392), (872, 20870), (1090, 16696), (1744, 10435), (2087, 8720), (2180, 8348), (4174, 4360)]