18405740

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{8443}}^1$

素因数の和:8561

約数の個数: 24

約数和(自身を含む): 39011280

約数和(自身を除く): 20605540

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 8443, 16886, 33772, 42215, 84430, 168860, 920287, 1840574, 3681148, 4601435, 9202870, 18405740]

約数ペア:

[(1, 18405740), (2, 9202870), (4, 4601435), (5, 3681148), (10, 1840574), (20, 920287), (109, 168860), (218, 84430), (436, 42215), (545, 33772), (1090, 16886), (2180, 8443)]