21684920

素因数分解:

$2^3\times 5^1\times {\mathrm{542123}}^1$

素因数の和:542134

約数の個数: 16

約数和(自身を含む): 48791160

約数和(自身を除く): 27106240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 542123, 1084246, 2168492, 2710615, 4336984, 5421230, 10842460, 21684920]

約数ペア:

[(1, 21684920), (2, 10842460), (4, 5421230), (5, 4336984), (8, 2710615), (10, 2168492), (20, 1084246), (40, 542123)]