16808720

素因数分解:

$2^4\times 5^1\times {\mathrm{210109}}^1$

素因数の和:210122

約数の個数: 20

約数和(自身を含む): 39080460

約数和(自身を除く): 22271740

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 210109, 420218, 840436, 1050545, 1680872, 2101090, 3361744, 4202180, 8404360, 16808720]

約数ペア:

[(1, 16808720), (2, 8404360), (4, 4202180), (5, 3361744), (8, 2101090), (10, 1680872), (16, 1050545), (20, 840436), (40, 420218), (80, 210109)]