81103420

素因数分解:

$2^2\times 5^1\times {\mathrm{1009}}^1\times {\mathrm{4019}}^1$

素因数の和:5037

約数の個数: 24

約数和(自身を含む): 170528400

約数和(自身を除く): 89424980

約数列:

[1, 2, 4, 5, 10, 20, 1009, 2018, 4019, 4036, 5045, 8038, 10090, 16076, 20095, 20180, 40190, 80380, 4055171, 8110342, 16220684, 20275855, 40551710, 81103420]

約数ペア:

[(1, 81103420), (2, 40551710), (4, 20275855), (5, 16220684), (10, 8110342), (20, 4055171), (1009, 80380), (2018, 40190), (4019, 20180), (4036, 20095), (5045, 16076), (8038, 10090)]