18008720

素因数分解:

$2^4\times 5^1\times {\mathrm{225109}}^1$

素因数の和:225122

約数の個数: 20

約数和(自身を含む): 41870460

約数和(自身を除く): 23861740

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 225109, 450218, 900436, 1125545, 1800872, 2251090, 3601744, 4502180, 9004360, 18008720]

約数ペア:

[(1, 18008720), (2, 9004360), (4, 4502180), (5, 3601744), (8, 2251090), (10, 1800872), (16, 1125545), (20, 900436), (40, 450218), (80, 225109)]