81777620

素因数分解:

$2^2\times 5^1\times {\mathrm{971}}^1\times {\mathrm{4211}}^1$

素因数の和:5191

約数の個数: 24

約数和(自身を含む): 171950688

約数和(自身を除く): 90173068

約数列:

[1, 2, 4, 5, 10, 20, 971, 1942, 3884, 4211, 4855, 8422, 9710, 16844, 19420, 21055, 42110, 84220, 4088881, 8177762, 16355524, 20444405, 40888810, 81777620]

約数ペア:

[(1, 81777620), (2, 40888810), (4, 20444405), (5, 16355524), (10, 8177762), (20, 4088881), (971, 84220), (1942, 42110), (3884, 21055), (4211, 19420), (4855, 16844), (8422, 9710)]