18654260

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{109}}^1\times {\mathrm{199}}^1$

素因数の和:360

約数の個数: 48

約数和(自身を含む): 40656000

約数和(自身を除く): 22001740

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 109, 172, 199, 215, 218, 398, 430, 436, 545, 796, 860, 995, 1090, 1990, 2180, 3980, 4687, 8557, 9374, 17114, 18748, 21691, 23435, 34228, 42785, 43382, 46870, 85570, 86764, 93740, 108455, 171140, 216910, 433820, 932713, 1865426, 3730852, 4663565, 9327130, 18654260]

約数ペア:

[(1, 18654260), (2, 9327130), (4, 4663565), (5, 3730852), (10, 1865426), (20, 932713), (43, 433820), (86, 216910), (109, 171140), (172, 108455), (199, 93740), (215, 86764), (218, 85570), (398, 46870), (430, 43382), (436, 42785), (545, 34228), (796, 23435), (860, 21691), (995, 18748), (1090, 17114), (1990, 9374), (2180, 8557), (3980, 4687)]