20388650

素因数分解:

$2^1\times 5^2\times {\mathrm{409}}^1\times {\mathrm{997}}^1$

素因数の和:1418

約数の個数: 24

約数和(自身を含む): 38053740

約数和(自身を除く): 17665090

約数列:

[1, 2, 5, 10, 25, 50, 409, 818, 997, 1994, 2045, 4090, 4985, 9970, 10225, 20450, 24925, 49850, 407773, 815546, 2038865, 4077730, 10194325, 20388650]

約数ペア:

[(1, 20388650), (2, 10194325), (5, 4077730), (10, 2038865), (25, 815546), (50, 407773), (409, 49850), (818, 24925), (997, 20450), (1994, 10225), (2045, 9970), (4090, 4985)]