21186040

素因数分解:

$2^3\times 5^1\times {\mathrm{673}}^1\times {\mathrm{787}}^1$

素因数の和:1471

約数の個数: 32

約数和(自身を含む): 47800080

約数和(自身を除く): 26614040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 673, 787, 1346, 1574, 2692, 3148, 3365, 3935, 5384, 6296, 6730, 7870, 13460, 15740, 26920, 31480, 529651, 1059302, 2118604, 2648255, 4237208, 5296510, 10593020, 21186040]

約数ペア:

[(1, 21186040), (2, 10593020), (4, 5296510), (5, 4237208), (8, 2648255), (10, 2118604), (20, 1059302), (40, 529651), (673, 31480), (787, 26920), (1346, 15740), (1574, 13460), (2692, 7870), (3148, 6730), (3365, 6296), (3935, 5384)]