21686904920

素因数分解:

$2^3\times 5^1\times {\mathrm{542172623}}^1$

素因数の和:542172634

約数の個数: 16

約数和(自身を含む): 48795536160

約数和(自身を除く): 27108631240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 542172623, 1084345246, 2168690492, 2710863115, 4337380984, 5421726230, 10843452460, 21686904920]

約数ペア:

[(1, 21686904920), (2, 10843452460), (4, 5421726230), (5, 4337380984), (8, 2710863115), (10, 2168690492), (20, 1084345246), (40, 542172623)]