20318860

素因数分解:

$2^2\times 5^1\times {\mathrm{997}}^1\times {\mathrm{1019}}^1$

素因数の和:2025

約数の個数: 24

約数和(自身を含む): 42754320

約数和(自身を除く): 22435460

約数列:

[1, 2, 4, 5, 10, 20, 997, 1019, 1994, 2038, 3988, 4076, 4985, 5095, 9970, 10190, 19940, 20380, 1015943, 2031886, 4063772, 5079715, 10159430, 20318860]

約数ペア:

[(1, 20318860), (2, 10159430), (4, 5079715), (5, 4063772), (10, 2031886), (20, 1015943), (997, 20380), (1019, 19940), (1994, 10190), (2038, 9970), (3988, 5095), (4076, 4985)]