20985920

素因数分解:

$2^6\times 5^1\times {\mathrm{65581}}^1$

素因数の和:65598

約数の個数: 28

約数和(自身を含む): 49973484

約数和(自身を除く): 28987564

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 65581, 131162, 262324, 327905, 524648, 655810, 1049296, 1311620, 2098592, 2623240, 4197184, 5246480, 10492960, 20985920]

約数ペア:

[(1, 20985920), (2, 10492960), (4, 5246480), (5, 4197184), (8, 2623240), (10, 2098592), (16, 1311620), (20, 1049296), (32, 655810), (40, 524648), (64, 327905), (80, 262324), (160, 131162), (320, 65581)]