81657020

素因数分解:

$2^2\times 5^1\times {\mathrm{503}}^1\times {\mathrm{8117}}^1$

素因数の和:8629

約数の個数: 24

約数和(自身を含む): 171841824

約数和(自身を除く): 90184804

約数列:

[1, 2, 4, 5, 10, 20, 503, 1006, 2012, 2515, 5030, 8117, 10060, 16234, 32468, 40585, 81170, 162340, 4082851, 8165702, 16331404, 20414255, 40828510, 81657020]

約数ペア:

[(1, 81657020), (2, 40828510), (4, 20414255), (5, 16331404), (10, 8165702), (20, 4082851), (503, 162340), (1006, 81170), (2012, 40585), (2515, 32468), (5030, 16234), (8117, 10060)]