18039980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{128857}}^1$

素因数の和:128873

約数の個数: 24

約数和(自身を含む): 43296288

約数和(自身を除く): 25256308

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 128857, 257714, 515428, 644285, 901999, 1288570, 1803998, 2577140, 3607996, 4509995, 9019990, 18039980]

約数ペア:

[(1, 18039980), (2, 9019990), (4, 4509995), (5, 3607996), (7, 2577140), (10, 1803998), (14, 1288570), (20, 901999), (28, 644285), (35, 515428), (70, 257714), (140, 128857)]