20407640320

素因数分解:

$2^8\times 5^1\times {\mathrm{15943469}}^1$

素因数の和:15943490

約数の個数: 36

約数和(自身を含む): 48882679020

約数和(自身を除く): 28475038700

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 640, 1280, 15943469, 31886938, 63773876, 79717345, 127547752, 159434690, 255095504, 318869380, 510191008, 637738760, 1020382016, 1275477520, 2040764032, 2550955040, 4081528064, 5101910080, 10203820160, 20407640320]

約数ペア:

[(1, 20407640320), (2, 10203820160), (4, 5101910080), (5, 4081528064), (8, 2550955040), (10, 2040764032), (16, 1275477520), (20, 1020382016), (32, 637738760), (40, 510191008), (64, 318869380), (80, 255095504), (128, 159434690), (160, 127547752), (256, 79717345), (320, 63773876), (640, 31886938), (1280, 15943469)]