21491020

素因数分解:

$2^2\times 5^1\times {\mathrm{283}}^1\times {\mathrm{3797}}^1$

素因数の和:4089

約数の個数: 24

約数和(自身を含む): 45302544

約数和(自身を除く): 23811524

約数列:

[1, 2, 4, 5, 10, 20, 283, 566, 1132, 1415, 2830, 3797, 5660, 7594, 15188, 18985, 37970, 75940, 1074551, 2149102, 4298204, 5372755, 10745510, 21491020]

約数ペア:

[(1, 21491020), (2, 10745510), (4, 5372755), (5, 4298204), (10, 2149102), (20, 1074551), (283, 75940), (566, 37970), (1132, 18985), (1415, 15188), (2830, 7594), (3797, 5660)]